20mm for GTS / GTS 2 / GTS 2E / GTS 2 MINI / BIP U / BIP U PRO22mm for GTR 2 / GTR 2E / STRATOSSilicone Strap: Milanese Watch Strap:
Stainless Steel Watch Strap:
22mm Leather Strap:22mm Crocodile Skin Print Leather Strap:22mm Nylon Strap: