To be used with the WM97+ CT Boiler. 18.2 gallon 316L stainless steel tank. 1-1/4" diameter 304 stainless steel coil. Thermostatic mixing valve. 3/4" temperature and pressure valve. Drain valve. Taco 3 speed circulator (selector switch). Two 1" 316L stainless steel flexible connection hoses. Wire harness and plugs for quick boiler control connection. Two tank temperature sensors. Leveling legs.