Maytronics Dolphin DX4 Outer Casing (99952047 ASSY) sgsinstruments The Hayward universal fuse service The Hayward universal fuse service kit is designed for compatible electrical control applications where replacement fuse components are needed during service This cartridge has practical value because a properly matched replacement helps restore filter performance without requiring a change to the larger housing or filter assembly An outer casing helps form and protect the body of a compatible robotic cleaner This casing has practical value because a damaged outer shell can affect both the look and the fit of the cleaner even when internal assemblies remain serviceable