CAPACITY: 20 Gallons. Thermal Insulation Material : Rock wool 2 Inch Thickness. High Quality Imported Gi Sheet : 10–10 SWG With Heat Proof Paint. Provision of Water Ports : Inlet / Outlet 1", Purging 1", Drain 1" THERMOSTAT: Mefco New. WARRANTY: ONE Year For Thermostat. 5 Years For Tank.