ISPRING HB18B 10-Inch Big Blue Water Filter Housing 1-Inch Outlet/Inlet Heavy Duty Pressure Release Button 1" inlet/outlet Package includes wrench to open and tighten the housings Fit standard size filtration replacement cartridges: 4.5"x10" Maximum Temperature: 100DegreeF (37.8DegreeC) Maximum Pressure: 90 psi (6.2 bar) Cartridges are recommended to change every 6 months (not included)