Complete 4 sets 20 inch big clear housing. With plastic wrench, screw and metal bracket. Allows you to see when you need to change filters and everything else works as it should. Pack of 4 sets. Equip with pressure release button for high pressure. Inlet/Outlet: 1 NPT Thread. Please refer above photo. Maximum Pressure: 80 psi. SUGGESTED WORK PRESSURE: UNDER 50 PSI. Temperature:40-110°F/5-45°C , Shelf life: 5 Years. What is dimension of the big clear housing? It is standard sized housing for 4.5″OD x 20″ height filters. What is in the box? 4 x 20 inch big. Housing with pressure release , 4 x plastic wrench , 4 x metal bracket and 4 x screws. 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. You may search “whole house water filter ” on YouTube, there is some video about this housing, it is very helpful if it is the first time to install it. 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. The item “Geekpure 20 Whole House Water Filter Housing Fit 4.5 x 20 Filters Pack 4″ is in sale since Tuesday, September 14, 2021. This item is in the category “Home & Garden\Kitchen, Dining & Bar\Small Kitchen Appliances\Water Purification\Water Filters”. The seller is “geekpurewater” and is located in Rowland Heights, California. This item can be shipped to United States.