This kit is required for installing a hot water style heater in your car. The kit gives you 8' of 3/4" I.D. heater hose, elbow style shut-off valve that is 3/8 pipe thread on one side and has 3/4" hose barb on the other, 3/8 pipe thread to 3/4" hose barb, 3/8 ID to 1/2 OD pipe adapter, and 4 hose clamps. USA