The Inland Seas Nu-Clear Model 506 is a filter body without any filtration media. You can fill the filter with your own bio balls, carbon or other filter media. It comes with full flow grid, but it does not come with cartridge plug for use with micron cartridges. Other Features:Heavy duty molded PVC construction with a stainless steel lid clamp for secure leak free operation2 year manufacturer guaranteeFilter bodies are approximately 13" wide and 12.5" tall (overall width with fittings is 15). An additional clearance of 8 above the filter is required to remove the cartridge for cleaning.Can be used with the Model 1506 Extension Kit to double the filtering capacity1" FNPT inlet and outlet ports allowing for higher flow rates (up to 1,200 gallons/hr) than similar filters with 3/4 portsAll models come with adapters for 3/4" and 1" hose, stainless steel hose clamps, Teflon tape, and a drain valveDoes not include pump, hose or a method for connecting the filter to your tank. We highly recommend using the Inland Sea Suctions and Returns with the Nu-Clear Filters, and we carry several models of aquarium and pond water pumps.