Feature: 4 Different Sizes It offers 18mm, 20mm, 22mm, and 26mm. Please confirm the width of your watch strap to choose the appropriate size. Anti-slip Design Designed with an anti-slip bar for secure insertion into the strap holes, helping prevent accidental detachment. Skin-friendly Material Made of high-quality silicone, soft and durable, providing a comfortable wearing experience. Classic Black & White Includes 10 pieces each of black and white strap fasteners. One loop is sufficient to secure your watch strap. Waterproof Resistant to water and sweat. Compatibility 18mm strap fastener: compatible with GARMIN Venu 2S, vivomove 3S, Garminmove 3S, vivoactive 4S, Garmin Active S 20mm strap fastener: compatible with GARMIN Venu Sq, Venu, vivomove 3, Garminmove 3, vivoMove Luxe, Garminmove Luxe, vivoMove Style, Garminmove Style, vivomove (HR sport version), vivoactive 3 (music), Forerunner 245 (music), Forerunner 645 (music) 22mm strap fastener: compatible with GARMIN Venu 2, vivoactive 4, Garmin Active 26mm strap fastener: compatible with GARMIN Fenix 5X, 5X Plus, 3, 3HR Specifications: Material: Silicone Size: 18mm, 20mm, 22mm, 26mm (available in options) Color: Black, White (available in options) Packing List: 10 x Watch Strap Fasteners