COMPLETE-Complete one set 20inch big blue housing, 1NPT inlet/outlet, with pressure release button for high flow, plastic wrench and metal bracket. STANDARD-Fits all standard sized 4-1/2 inch diameter industry 20 inch whole house cartridges. HIGH QUALITY-Fits NSF standard, Large capacity housing for high flow applications. Maximum Pressure: 90 psi (6.2 bar). Shelf life: 5 Years. What is dimension of the big blue housing? It is 4.5″OD x 20″ height. What is in the box? 3pcs 20inch big blue housings with pressure release, 3pcs plastic wrench, 3pcs metal bracket, bracket screws(not include expansion screw). What is filters options? PP spun filter, Remove sand, dirt, sediment. Life time:6 months. Carbon block filter, Further remove chlorine, taste & odors, very fine particulates. The Life Time of the Filter Cartridge Depends on Usage Amount and Feed Water Quality. Please lubricate the o-ring with silicon grease and use wrench provided to prevent leakage. Protect filter housing from freezing. The rubber o-ring provides the water tight seal between the cap and the sump. It is important that the o-ring be properly SEATED IN THE GROOVE of a water leak could occur. This item is in the category “Home & Garden\Home Improvement\Plumbing & Fixtures\Pumps & Water Filtration Systems\Water Filtration Systems”. The seller is “geekpure-water-group” and is located in this country: US. This item can be shipped to United States.