Quality Material: Watch fastener rings are made of durable and lightweight silicone material. Perfect fit for your activity tracker and comfortable wearing experience. Easy to Use: 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. Include: 4pcs watch strap loops with 1pcs spring . Wide to Use: The replacement strap fixing ring is suitable for most wristbands or smart watch straps . Watch Protection: The superior rubber strap ring fixes the end of the strap in place to protect the strap of the smartwatch from being lost or damaged. Specification: Material: Silicone Color: Black Size Chart: Spring Bar Tool Length: 7.8cm/3.07inch Watch Strap Loop Length(Optional): 1.8cm/0.71inch 2cm/0.79inch 2.4cm/0.94inch 2.6cm/1.02inch Package Includes: 4 Pieces Watch Strap Loops 1 Piece Spring Bar Removal Tool Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!