The O Ozone Strap is specially designed for Galaxy Watch4 Classic (42mm & 46 mm) Galaxy Watch4 (40mm & 44mm), Galaxy Watch Active 2 (40mm & 44mm), Galaxy Watch Active (40mm), Galaxy Watch (42mm), Galaxy Watch3 (41mm) and Compatible with all smartwatches with 20mm width watch lugs. Features: Premium Material: Made of high-quality stainless-steel, breathable and comfortable to wear. Adjustable Size: Fits 20mm width watch lugs. The size can be adjusted according to the circumstance of the individual wrist. Easy to Install: Come with quick release pins, which lock onto the Samsung Watch interface precisely and securely, no tool needed. Package includes: 1 x O Ozone 20mm Metal strap for Galaxy Watch 4