This Bundle is a complete set of replacement media for the OASE BioMaster 350 Canister Filter and the OASE BioMaster Thermo 350 Canister Filter w/ Heater. It includes EIGHT items: 1X OASE BioMaster 250, 350, 600 & 850 Replacement 45ppi Carbon Pre-Filter Foam 6-Pack; 1X OASE BioMaster 250, 350, 600 & 850 Replacement 30ppi Filter Foam; 2X OASE BioMaster 250, 350, 600 & 850 Replacement 20ppi Filter Foam; 1X OASE BioMaster 250, 350, 600 & 850 Replacement Hel-X 13 Biomedia 800 ml; Inland Seas Super Lube Silicone Lube 1cc; & a MarineAndReef Towel. We highly recommend you lubricate the BioMaster Filter o-rings once or twice a year with the Inland Seas Super Lube Silicone Lube 1cc. Though this is listed as an Inland Seas product, ALL the media comes from OASE with the original OASE packaging. NOTE: This package come with six of the Carbon Pre-Filter Foams, but the Filter only takes five. OASE only does 6-packs of this item. The MarineAndReef Aquarium Cleaning Towel is a durable, lint-free microfiber towel. 19" X 15".