The OMB-Series of replacement cartridges feature the new OmnipureBlock™ media. This high quality carbon block media is manufactured from raw materials to precise specifications entirely at the Omnipure manufacturing facility. Filter elements are available in 10 micron, 5 micron, 1 micron and 1 micron lead reduction formulations. Elements are finished with a single layer of spun-bonded polypropylene netting. Polypropylene end caps with compression gaskets are standard. Ask your Omnipure representative about custom formulations and alternative finishing options.