Thermal Expansion Check Valve Kit, To Be Used With Ghc,Gua and Gcn Indoor Coils for Heat Pump and Cooling Only Applications and Mhd Coils for Cooling Applications Only, Inlet: 5/16" Sweat, Outlet: 5/16" Sweat, Has a Thermal Expansion/Check Valve, Capillary Tube Length:30", Includes Insulation Strip, Dims: 4" H X 3" W X 5" D, Weight:1.4 Lbs, Country of Origin:Unknown