Each hose has a rubber washer pre-installed in both female hose end fittings. It is recommended to change your washing machine hoses every 5 years. Includes 1 red and 1 blue hose for easy installation. 3/4 in. threaded female fittings on both ends of 4 ft. hose. Withstand temperatures up to 140°F. Great item for do-it-yourselfer. Maximum working pressure is 125 psi.