IMPROVE YOUR ROBOTIC POOL CLEANER'S PERFORMANCE - Worn out tracks cause several performance setbacks for your automatic pool cleaner.It may begin with sluggish movement, lack of traction on the pool floor, and inability to climb wallsDon't wait until the cleaner begins to malfunction. Get ahead of your pool cleaner maintenance with a pair of new, high-performance timing tracks.Robotic Pool Cleaner Model Compatible - Great for models requiring 2 tracks (one on each side), including models: Dolphin DX, Dolphin Explorer, for Dolphin , Dolphin Wave, Dolphin , Dolphin Advantage and more.Replace Timing Tracks in Pairs - It's easy to replace just the track that looks more worn.Colour:GrayMaterial:rubberPackage Contents:1x Cleaner drive beltOnly 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.