Tarpaulin Tensioners: Black ball tensioners included, 50 pieces, cable length 150 mm. These reliable rubber straps provide a secure hold for your tarpaulins and banners. High-quality rubber and plastic balls. It is durable and friction-resistant. It has a lot of pulling force and can hold the tarpaulin firmly. The tarpaulin tensioner is suitable for tents, posters, exhibition halls, trampolines, mesh banners and PVC banners. It has a large pulling force and can firmly fix the tarpaulin. This ball tensioner is easier to use than other tensioners, just thread the rubber cable through the hole and place it on the ball. This cable has the best elasticity. Don't worry about your stuff being so bulky that the cables will break. The rubber ball bungee cord installs and removes in seconds. The plastic and rubber are highly weather resistant and the length of the rubber can be adjusted by moving the knot.