Zen Water Systems Countertop Filtration and Purification System, 4-Gallon Transform tap water into clean, healthy, alkaline mineral water. o-rings and the wing nut are attached to the stem of the ceramic filter 5 Functions Combined in 1 System: Filter, Purify, Mineralize, Alkalize and Magnetize Removes bacteria, contaminants, chlorine, impurities and other man-made chemicals and adds micro-nutrients and bio-energy properties. BPA-Free; No electricity or plumbing required; Easy assembly; Convenient, versatile & affordable Ceramic filter will last 1,000 gallons or 1 year; 5-Stage mineral filter will last 500 gallons or 6 months;The ceramic O ring is attached to the stem of the ceramic filter. The Magnetic nut is attached to the stem of the Magnetic Tap/Spout. Simply turn the ceramic filter upside down,the o-rings and the wing nut are attached to the stem to prevent the wing nut from scratching/damaging the surface of the ceramic The Countertop system comes complete with: Micro-Ceramic Filter, 5-Stage Mineral Cartridge Filter, Maifan Mineral Stones and Magnetized Spigot. The System can be used with or without the base. Not recommended for use with microbiologically unsafe water. o-rings and wing nut are attached onto the stem of the ceramic filter.