Vulcanized DUAL-COLORED rubber strap which is precisely calibrated to fit the Rolex Explorer I (39mm only). This strap utilizes "Blocked Integration" engineering, incorporating solid inserts for a flawless, motionless flush mount to the Explorer I 39mm case*. (Not compatible with the 36mm model).

- Made in Switzerland of pure vulcanized rubber. No coating, blends or bonding.

- Exceeds FDA and BVGG specifications: non toxic, non-marking and non-allergen.

- Universal fit for wrist sizes XXS - XL ( 5 1/2 - 8 1/4 inches or 14 - 21 cm ).

- Does NOT use any links from your original Rolex bracelet for sizing purposes.