Approx Size: Φ40mm x φ10mm x 70mm, please check your filter to purchase the size you need.
Package included: 12 Pcs Pre-filter Spong.
Please note these foam are pre filter sponges,so only have single hole.
Anything larger than a 1/2 inch inner diameter is a no go with these pre-filters.
Enhances biological filtration: 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 long lasting filtration.

Features
Easily connects to filter intake stem
Prevents small and baby inhabitants from being drawn into filter
Traps particles and debris