Super Small Air-Lift Submersible Filter Set for Watercraft Eight Core Mini Replacement Filter Watercraft Eight Core Mini Replacement Filter 3P x 2 (6 pieces), Replacement Plaston Mini (2 pieces). Easy maintenance and quick replacement set. Better than size filtration, clear water. Generous oxygen supply For small aquariums under 5 liters. Since its launch in 1982, the standard model of the water filter has been widely supported by beginners and professional users, and has been changed to a full model. The basic performance such as filtration capacity is now easier to use, such as how to change the filter material. [Mizumono Com Exclusive Extrary Wiping Pad] *Please note that some packaging may differ slightly from the image, but the contents are the same.