• 1 Piece: Dimension: 23.6'' X 17'' X 2'' (Blue 20Ppi) This Is Not Vacuum Sealed So It Can Be Used Right Away Without Waiting And Extra Work Of Preparation.
• Dimension: 23.6'' Lx 17''W x 2''H; PPI: 20 Blue Pad
• Easy Installation: This filter sponge is not vacuum sealed so it can be used right away without waiting and extra work of preparation. Can be accurately cut to fit to the desired size and used as a pre-filter for any aquarium or pond filter sump wet/dry canister power filter etc. or your HMF DIY project.
• Premium Material: Manufactured from high-quality sponge material. This product ensures durability and long-term stability. The sponge is resistant to deformation decomposition and dissolution maintaining its filtration efficiency and longevity.
• Traps large bits of waste and provides better water flow rate and less chance of clog.
• Reusable: This Sponge is easy to clean and maintain. It can be washed and reused multiple times allowing you to restore its filtration performance regularly and prolong its lifespan offering an economical and eco-friendly filtration solution.

The size of pores is measure in pores per inch (PPI). The sponge with higher PPI has more pores in it. More pores means larger filtration capacity but with less water flow through rate and needs to be cleaned more often. It is recommended to use combination of sponge with difference PPI to get the best result.