Suunto ambit3 peak sapphire strap sapphire this comfortable strap fits ambit3 peak ambit2 this is the original strap for the suunto ambit3 peak sapphire watch you can change the strap yourself using a size 6 ip torx plus screwdriver the soft silicone strap feels comfortable on your wrist and fits wrist sizes 13 to 23 cm 5 to 9 in in circumference