This product is the common Replacement Filter Pad For the Large AquaFalls. The common pad material is more difficult to clean than Matala material, but it is preferred by many for its amazing ability to trap small debris. This Large AquaFalls pad is shaped like a trapezoid, measuring 44"long on one end, 51" long on the other and 30" wide. 3 pads per Aquafalls are required.