Maytronics 3889201 C7 Wave Belt T10/980 is a replacement belt for the Wave 300/300XL, the Wave 140, and the Wave 200 XL pool cleaners. Easily replace the belt on a pool cleaner and continue to have it working like a charm and keep the pool from getting dirty. The belt is what helps make the whole cleaner work, replace before it goes out for best results.