Buy 15 Ppi 20 Ppi 25 Ppi Polyurethane Open Cell Reticulated Bio Foam Sponge Filter from Pingxiang Guangyu Import And Export Trade Co., Ltd., China | Tradewheel.com
RETICULATED FOAM – BLACK – 10 PORES PER INCH (PPI) - Foam Mart
Amazon.com: FOAMMART Scott Reticulated Filter Foam - 10 PPI - 12" X 38" (1/4 x 12 x 38) : Electronics
Filter Foam for the BioPlus 20 ppi blue – OASE Living Water
6 1/2" Foam Filter Set - GreatWave Engineering
Air Filter Foam Sheet, Black (30 PPI Coarse), 12 x 24 x 3/8 - Pegasus Auto Racing Supplies
Poret® Foam Shop - SWISSTROPICALS
Amazon.com : OASE Indoor Aquatics Pre-Filter Foam Set of 6 for The Biomaster 30 Ppi, Black : Pet Supplies