Gray Climbing Brush is a replacement set for pool cleaners. The brushes fit the following pool cleaners: Dolphin Triton Plus, Dolphin DX5 Plus, Dolphin DX6, Dolphin Dynamic DX6, Dolphin Supreme M5, Dolphin Apollo Plus, Dolphin Apollo Windo, Dolphin M400, Dolphin M500, Dolphin Wave 75, Dolphin Wave 100, and Dolphin Liberty.