Fluval U Series Bio Foam Sponge Replacement Media U1 U2 U3 U4 MINI Filter

Fluval foam pads for the Mini, U1, U2, U3 AND U4 Fluval Box Contents (A488) U4 = 2pk. For Fluval U underwater filters. (A487) U3 = 2pk. (A485) U1 = 1pk. (A486) U2 = 2pk. It is custom-made to fit perfectly inside the filter chamber to prevent debris bypass.

eBay