Feature:4 Different SizesIt offers 18mm, 20mm, 22mm and 26mm. Please confirm the width of watch strap first to choose the appropriate size.Anti-slip DesignIt is design with anti-slip bar to well inserted into holes of the strap, not easy to fall off.Skin-friendly MaterialMade of high-quality silicone, it is soft and durable, offering comfortable wearing experience.Classic Black & WhiteIt comes in 10pcs black or white strap fasteners. One loop can already secure your watch strap.WaterproofIt is water and sweat resistant.Compatibility18mm strap fastener: compatible with GARMIN Venu 2S, vivomove 3s, Garminmove3S, vivoactive 4s, GarminActive S;20mm strap fastener: compatible with GARMIN Venu Sq, venu, vivomove3, Garminmove3, vivoMove Luxe, GarminmoveLuxe, vivoMove style, Garminmove style, vivomove (HR sport version), vivoactive3 (music), Forerunner 245 (music), Forerunner645 (music);22mm strap fastener: compatible with GARMIN Venu 2, vivoactive4, GarminActive;26mm strap fastener: compatible with GARMIN Fenix 5X/5X Plus/3/3HR.Specification:Material: SiliconeSize: 18mm, 20mm, 22mm, 26mm (Optional)Color: Black, White (Optional)Packing list:10 * Watch Strap Fasteners