"This Worthington Cylinders 20-lb. 4.7 gallon propane tank is manufactured to DOT specifications. An OPD valve prevents the hazards caused by overfilling the tank. Powder-coated for years of service. U.S.A. Compatible With Propane, Finish Type Powder-coat, Cylinders qty. 1, Capacity 20 lb. 4.7 gallons, Common Usage Propane tank, Closure Type OPD valve."