FEATURE: High-quality vulcanized rubber is used for all StrapXPro rubber straps. The rubber formula was scientifically developed for StrapXPro, it is tested and fine-tuned to its maximum performance. StrapXPro rubber watch straps are strongly resistant to sweat, dust, odors, and UV radiation. Our waterproof rubber straps undergo rigorous stretching and tearing tests to ensure their durability; nevertheless, our StrapXPro Watch Straps are FDA, RoHS and REACH-certified. StrapXPro Premier Series rubber watch strap is a creation that craftily offers a 3D bracelet design; the wrist curved angles are precisely calculated to provide an ergonomically comfortable fit. The tailormade StrapXPro Premier Series curved end watch strap fits perfectly with Seiko Prospex 1968 Diver’s Modern Re-interpretation MM200 GMT watches. The StrapXPro Premium Series is made to use with three-fold clasps, its cut-to-fit design can easily be adjusted to fit all wrist sizes. SPECIFICATION: MATERIAL High-quality vulcanized rubber (Resistant to Sweat, Dust, UV, and Odorless) STRAP COLOR Black, Navy Blue, Green CERTIFICATEFDA, RoHS & REACH-certified LUG WIDTH20mm LUG END STYLECurved endDIVER CLASP SIZE18mmDIVER CLASP INCLUDEOptionalWRIST SIZE4.7 inches to 8.6 inches / 120 mm to 220 mm(With StrapXPro divers clasp)OVERALL LENGTH95mm+95mm DESIGN TO FIT: Seiko Modern Re-interpretation MM200 GMT Series SPB381, SPB383, SPB385, SPB439, SPB475, SPB487, SBEJ009, SBEJ013, SBEJ011, SBEJ021 WHAT'S INCLUDED? Watch strap 2pcsCustomized spring bars 2pcs* Use the included customized spring bars for installation.**Watch is not included.