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- Bonetto Cinturini 400GT Rubber Watch Strap - Black
Bonetto Cinturini 400GT Rubber Watch Strap - Black
Double Face construction. Italian-made NBR rubber. Steel deployant clasp.
Model 400GT is the lightly textured side of Bonetto Cinturini’s reversible 400 series. The reverse side (400CT) has a carbon pattern. The strap can be flipped by removing the spring bars, allowing either side to be worn outward. The brushed steel deployant clasp creates a clean continuous profile without the loose tail of a traditional buckle strap. The strap can be cut to size for a more precise fit.
Material & feel
Made from vulcanized NBR rubber, the strap has a firm, dense feel with controlled flexibility. At 4.5mm thick, it carries more presence than slimmer rubber straps but remains comfortable once shaped to the wrist. The lightly textured side gives a simpler effect, while the reverse carbon fiber-embossed side adds depth against the case.
Carries a light vanilla scent, typical of Italian-made vulcanized rubber.
Learn more in our Rubber Watch Strap Guide.
Sizing & specs Length, taper, spring bars, buckle finish and more
Taper:
- 20mm lug / 18mm buckle
- 22mm lug / 20mm buckle
Fit guidance
Fit is adjusted by trimming the strap at the clasp end using the pre-set pinholes. Because there is no traditional tail, proper sizing depends on trimming and clasp alignment. For step-by-step cutting instructions, see our Bonetto Cinturini sizing guide.
Popular watch pairings
20mm strap width fits:
- Glycine Combat Sub 39
- Hamilton Khaki Field
- Omega Seamaster Diver 300M
- Omega Speedmaster Professional
- Rolex Submariner
- Sinn 104
- Tudor Black Bay Fifty-Eight
22mm strap width fits:
- Orient Kamasu
- Orient Ray II
- Tudor Black Bay
Wear & care
Swim ready, suitable for swimming and regular water exposure.
Clean with lukewarm water and mild soap as needed. Rinse thoroughly and allow to air dry fully. Avoid solvents, abrasives and petroleum-based cleaners.
About the brand
Bonetto Cinturini is an Italian manufacturer with more than forty years of experience producing rubber watch straps for professional and everyday use. The brand specializes in straps made from vulcanized nitrile butadiene rubber, selected for its durability, flexibility, and resistance to seawater and UV exposure.
Bonetto Cinturini straps are widely used by watch manufacturers and enthusiasts who value long-term performance, comfort, and straightforward, functional design.
Shipping
Orders placed by 2:00pm PST on business days typically ship the same day.
Tracking is included with every order and emailed at shipment.
United States
- USPS Ground Advantage: free on orders over $59, or $6.95 on orders up to $59. 3 to 6 business days.
- USPS Priority Mail: $11.95. 2 to 4 business days.
- USPS Priority Mail Express: $28.95. 1 to 3 business days.
International
- USPS First Class International: $18.95. 10 to 21 business days.
For complete shipping details, see our Shipping Policy.
Returns & exchanges
Unused items may be returned or exchanged within 60 days of purchase. Please contact us before sending an exchange.
For full return details and instructions, see our Returns Policy.
- 5 stars: 55 (83%)
- 4 stars: 9 (14%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 star: 2 (3%)
Strap is amazing! Very thick and premium feel. Easy to adjust with a sharp box cutter. Nice that there are two sides to it and you can choose which you like better. I have only two issues with it, one the clasp is very basic for such a high quality strap. I never intended to use it anyways so I'm not that upset about it, the strap is well worth the price even if it came with no clasp. Secondly, the strap is so thick I would have liked to have some holes in it to vent it a little as it can get a little sweaty on really hot days. All in all it's a great quality strap and will likely get a few others once more colors are introduced.
This is my third watch band purchased. Still have and using the first one purchased several years ago. Material and clasp are in excellent shape.
I purchased this Bonetto Cinturini Rubber Strap to pair with a new skeletonized CIGA Design Mechanical Watch Series Z Edge that I bought. The carbon fiber aesthetic of the strap pairs perfectly with the hyper modern/futuristic look of the watch. I particularly like the steel deployant that comes with the strap since it matches the look of the watch. The one thing that I found strange is the vanilla scent of the strap. I guess it's better than a strong chemical smell. Otherwise, great strap
Of course I have a green one from bonetto already, and had to also get a black one,they are so comfortable and smell great with the vanilla scented rubber. Using it on my Samsung Galaxy watch 7 classic. Great quality rubber, I love the pattern, and easily adjustable. Also decent price. Thank you holbens for the great selection!!
Got the Bonetto Cinturini 400GT Black Double Face Rubber Watch Strap. Changed the original to this strap with shortening to fit my wrist. It looks very nice. Received a few compliments already. I am a watch enthusiast and appreciate a valuable products. Fast delivery service and an excellent item.
Love the orange & dark green color combo on my Kamasu. I think I cut a bit too much off though, so be careful and use a pencil to draw straight line!
This is my second band from Bonetto and I’m pleased with it. My traditional Bonetto is on my Ecozilla and this deployment strap is on my Heimdallr.
BC rubber straps are exceptionally well made and beautifully finished. And I don’t believe they have any competition at this price point. Mike and the crew always provide great service! Highly recommended!
When my rubber-canvass strap on my Breitling began to look a bit frayed & ragged, I turned to Holbens as I knew he’d have the best selection of Bonetto Cinturini straps available. Sure enough, the 400 CT pairs perfectly with respect to thickness, taper, and subtle & elegant textured design. In fact, It looks as if came stock with the watch, and frankly looks BETTER than the OEM rubber-canvass strap. And because it’s the same thickness as the OEM strap, it integrates perfectly on both the lug and deployant ends with no height anomalies.
Specifically ordered this to match Certina DS PH 500M, I found a Certina deployment, match made!
I can't believe I'm writing a review for a watch strap but damn this is a nice watch strap!
Looks great on my vintage Vader Helmet.
The Bonetto Cinturini strap complements my Seiko "Bottle Cap" diver nicely. It's thick at 4mm, rugged, and sturdy. It's not easy to cut to size, but that characteristic increases my confidence in its craftsmanship. It's manly, like me.
Thicker than the 300 series, yet supple. Great eggshell texture on one side making it look matte. Vanilla scent not as strong and objectionable as the other bands. Very nice clasp.
Good quality and very comfortable. Don't be fooled by stamped clasp, it's solid and well made. But, for the price of this strap, it's worth buying just for the rubber should you choose to replace the clasp. It does have a fairly strong, but not unpleasant vanilla cake smell. It fades slightly after some time, but it's still pretty noticeable. Will likely buy more as my watch collection grows.
Love the strap, has a nice vanilla scent to it which could be a plus or minus for someone but I like it. Easy to cut to size and looks great! For the price, it’s perfect.
This strap is thick and heavy. Feels like quality! I love the smell. I think it looks great on my Seiko Tuna. I’m glad I chose this Bonetto Cinturini. Holben’s was great also! Fast shipping and awesome communication.
The BC rubber strap is great. Some people may not like the vanilla scent apparent on first opening it, but I personally like it and this brand is known for that scent. When I researched non-silicone rubber straps for my watch, this was one of the few brand I came across at this price point at this high a quality. Sizing the strap is a little stressful, because you don't want to screw it up, but it looks great and feels great when finished. The only improvement I would make in the strap is a machined/more unique clasp, but that would significantly increase the price point. That being said, the clasp it comes with works perfectly well. I really like this new style BC released where it is a smooth finish on one side and reversible to a carbon fiber like finish on the other. The smooth finish is slightly textured compared to their other model, the 300. I think this looks great as it almost gives it a leather-like look to the finisher rather than being a pure flat black. As you can tell, very happy with this purchase.