Features: brand new and high quality Give your fish pet a securaty habitate! these cylinder pre-filter sponge suit for all shrimp for tank owners and anyone else who has small fish in their for tank, provide them a safe environment. The open cell sponge has a much larger inner surface area for filtration capacity. The reticulated structure also provides better flow rate of water and less chance of clog. 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. This filter pad can be cut to fit and used as a pre-filter for any aquarium or pond filter, sump, wet/dry, canister, power filter etc. Specifications: Material: Sponge Size: Approx 30x40x2cm/ 11.81x15.75x0.79in Package Includes: 2 sheets Fish for Tank Filter Sponge note: 1. Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.