Rubber outer shell provides flexibility while inner strengthener cords provide endurance against stretching and breaking. It's super sturdy.Compatibility: This replacement belt kit fits for pool Automatic cleaner models 360 380Easy to install: Remove the old Belt and replace it with our new Belt and rotate slightly when worn for maximize life.Durable: Belt replacement kit life under normal operation is very long, the material of the belt is very strong, the bearing capacity and the working force are very good, and it is difficult to damage.size: diameter: 12cm, small diameter: 84cmMaterial:PUcolour:WhitePackage Contents:2 x drive belts (1 small and 1 )Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.