Waterway 2 Top Load Filter 50 sq ft 502-5010 This is a complete top load filter assembly The diameter of the hole in the niche for this canister is 6-7/8" Replaces 1-FA-TL2S50F , 319741 , 4668-13 ,...
Rainbow 50 Sq Ft Filter 40505 M4306 Diameter: 4 15/16"Length: 6 5/8" Center hole This is for a stack of 2x 6 5/8 inch long filters that makes up the complete 50 sqft filter set