Features: brand new and high quality. This sponge is original cotton for Sunsun Filter Sunsun HW-602/HW-602B. When the filter cotton gets dirty, can be washed with clean water or changed into new one. It is recommended to be replaced 2-3 months. Specifications: Item Type: Filter Sponge Material: Sponge Color: Black+Blue+Yellow (3pcs=1pc Black + 1pc Blue + 1pc Yellow) Diamter: 10.5cm/4.13" Thickness: 3.5cm/1.38" Quantity: 1 Set(3Pcs) (other accessories demo in the picture is not included) Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you 4.No retail package Package includes: 1 Set X Filter Sponge (No retail package)