Designed for easy use, the Mr. Heater Propane Appliance Extension Hose Assembly is used as an extension hose for easily connecting portable grills, stoves and more. 1/4 inch male pipe thread x 1/4 inch female pipe thread Used primarily as an extension hose for portable propane appliances 1/4 inch I.D. high pressure hose Hose material stretch tested to 400 psi Hose material pressure tested to 600 psi Order today!