This mechanical/biological medium filter pad is exclusively designed and made in Japan by world-renowned koi experts. Only the best quality material is used to ensure the best filtering results for your pond water. The densely-packed and intricately-woven material is extremely effective at filtering out small particulate waste. For best results, always place the coarse pad first against the water flow. The fine pad is sized to fit the Laguna powerflo filter falls 5000 and skimmer filter 5000. Measures 17-inch length by 14-inch height by 3/4-inch width. This product weighs 0.69-pound.