Grey replacement rails for robotic pool cleaners. At 25 cm long and 30 cm wide, these grey rails are slightly smaller than the usual long grey rails. However, at 3.8 cm deep, they are slightly thicker than other grey rails. HIGHLY COMPATIBLE WITH DOLPHIN ROBOTIC POOL CLEANERS - These grey rails replace parts on the following Maytronics Dolphin robotic pool cleaners: Active Series, Cayman, Discovery, Echo, E10, Encore, Escape, Nautilus CC, Premium, Prowler Series, Quantum and Triton. HIGH QUALITY DOLPHIN PARTS: Enjoy quality original parts at an affordable price. Made of premium rubber, these rails provide unmatched grip on pool walls and optimal maneuverability. SAVE MORE IN THE LONG RUN: Replacing parts is inevitable, but don't worry. Save money by purchasing durable parts that meet the highest industry standards.