Features: Steel body Zinc Plated to prevent corrosion Interchangeable with other Industrial (Hansen or Milton) couplers Check Valve, forged steel Specifications: Body: Steel, Zinc plated NPT size: 1/4″ NPT Female Temperature: -40 degree F to 212 degree F Type: Industrial Seals: Buna-N (Nitrile) Spring: Stainless Steel Ball Bearing: Quantity 6, stainless steel