If you are looking for some aquarium filter sponges, then you miss our aquarium filter sponges. Made of sponge material, they are stable, reliable and durable. A nice and wonderful filter accessory set for you. Features - Color: Black -Material:Sponge - Size: 8.00X4.00X4.00cm/3.14X1.57X1.57in - These pre-filter sponges could help to trap particles and debris,and prolong the life of your filter media,provide efficient water flow with less clogging for filtration. - The aquarium filter sponges are easy to install and remove, which is time-saving and effortless. - Thickened and durable sponge fish tank filter protective cover set, better protect the filter. - Reliable and stable sponge material, durable and stable, suit for freshwater and saltwater. - It can trap particulates and debris, reduce clogging, and can prevent young fish and shrimp from being sucked into the filter. Package list: 20 x Pre-filter Sponge