Features:<br> 1 set including 5 pieces that you can replace regularly. There are 2 sizes to choose from, 15mm (I.D.) and 22mm (I.D.).<br> 100% brand new and high quality<br> High quality of materials.<br> Prevent small fish and shrimp from getting in the filter.<br> Prevent sundries from getting into the filter so that extends the time of the filter.<br> This sponge is an accessory for aquarium filters, which plays a role in protection for inlets.<br> <br> Package Includes:<br> 5 Pieces Filter Sponge (S-15mm/L-22mm)<br> <br> Specifications:<br> Material: Sponge<br> Color: Black<br> Style: S-15mm/L-22mm<br> Size (Approx.):<br> S-3.5x6x1.5cm/1.38x2.36x0.59in<br> L-4x8x2.2cm/1.57x3.15x0.87in<br> Weight (Approx.): 52g<br> <br> note:<br> 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.<br> 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you