Description:MATERIAL: Black rubber replacement watch band strap loop ,made of silicone , a soft silicone like rubber.PACKAGE INCLUDED: 10 pieces replacement loop included .HOW to INSTALL: it is flexible, sturdy and easy to get on the wristband. Just stretched/slipped it over the buckle. Only take one second to replace , much easier to put on the watch by holding the band in place.HOW to CHOOSE SIZE : Take a ruler and measure your watch band width in mm, then add 1mm. Following that method, order the perfect size.Watch band replacement loops fit for more models silicone band. Fits right with most sports watches.Thickness Approx approx 8mm/0.3inch,inner width :10/12/14/16/18/19/20/22mmSpecification:Material: SiliconePackage Includes:10 pieces Silicone Watch Strap Loop