Interstate Pneumatics CA445B 1/4 Inch Automotive Brass Coupler 1/4 Inch Easy-Lock NPT 1/4 inch Automotive Brass Coupler x 1/4 inch Easy-Lock Barb: 1/4 inch Easy-Lock Temperature: -40 degree F to 212 degree F Seals: Buna-N (Nitrile) Ball Bearing: Quantity 6, stainless steel