20x200mm black silicone anti-slip nylon strap

All Purpose Straps make it easy to bundle, secure, and cinch cargo, luggage, toolboxes, equipment, and more. These fasteners cinch and adhere to itself for a firm hold. Great for power cords, camping, and organizing a variety of indoor or outdoor items. VELCOR Brand straps are easily adjustable and reusable.

You can know the function via  https://youtu.be/ORwEQKWsVNc