and of high quality.Made of high-quality heavy duty rubber.Upgraded wheel rail construction with a long service life and high performance, it is an ideal alternative to old, fossil or wheel tracks for MX6 / MX6 Elite / MX8 / MX8 Elite Suction Cup Pool Cleaner. R0526100 Exact wheel tracks are made of high-quality materials tested by the manufacturer, with good flexibility, ultra-durability and high elasticity, which can increase the life cycle of parts by 50%. Part number R0526100; 6 inches outside diameter, 5.5 inches inside diameter. Easy to install, no tools required, all tracks can be replaced in less than 5 minutes. Colour:Black Material:rubber Package Contents: 1set x for zodiac mx6 replacement parts Only the above package content, other products are not included. Note: Light reflection 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.