These are the replacement filter cartridges for the Eclipse System Three, the Eclipse Explorers, and the Eclipse Hex 5 tanks. Each cartridge contains 1 oz of super activated carbon. Just shake, rinse and install. Ensures even carbon distribution and no water bypass. For best results change monthly.
Rite-Size Cartridge: Z
Size: 3" long x 4 1/2" wide x 3/4" thick