[Premium Materials] For Dolphin pool cleaners, keep your for Dolphin robot working efficiently and it lasts longer. They are perfect for keeping your pool safe and functioning properly. Replacement Pool Cleaner Timing Tracks - Keep your pool cleaner in top condition with this replacement timing track. Improve the Performance of Your Robotic Pool Cleaner - Worn tracks can cause a variety of performance issues with your automatic pool cleaner. It can start with slow movement, lack of traction on the pool floor, and inability to climb walls. Don't wait until your cleaner starts to malfunction. Replace Timing Tracks in Pairs - It's tempting to replace only one track that looks more worn. But is, it 't take long for the other timing track to catch up with the wear of its paired track. Wear isn't always obvious, especially with timing tracks that wear in a steady and clean pattern. But as a rule of thumb, timing tracks that are over 2 years old should be inspected for wear and replaced as needed. Colour:As Shown Material:pp Package Contents: 2 * Underwater robot transmission belt 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. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!