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Double Face construction. Italian-made NBR rubber. Steel deployant clasp.
Model 400CT is the carbon-pattern side of Bonetto Cinturini’s reversible 400 series. The reverse side (400GT) has a lighter textured finish. 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.
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 carbon fiber-embossed side adds depth against the case, while the reverse lightly textured side provides a simpler effect.
Carries a light vanilla scent, typical of Italian-made vulcanized rubber.
Length:
87mm / 87mm (fits wrists 6.25–8.0in)
Taper:
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.
20mm strap width fits:
22mm strap width fits:
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.
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.
Orders placed by 2:00pm PST on business days typically ship the same day.
Tracking is included with every order and emailed at shipment.
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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.
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Independent watch strap specialist since 2007