CK Worldwide uses a unique head assembly that provides the largest water jacket available in an 18 or 20 series torch. With this type of construction, CK provides over 4 x the surface area for maximum heat transfer versus competitive torch heads! INCREASED COOLING CAPACITY!! Over 4 x the surface area for maximum heat transfer Cooler running torches Longer consumable life Will hook up to standard cables and hoses Fail-Safe hose fittings (no wire ties required) WARNING: Do not start bending your torch right out of the box! Strike a couple of arcs to warm up the coils inside the torch body for easier bending. Once warmed up, you are ready for bending the flexible area, generally, the area between where the handle starts and just about 1/2 before the head. Maximum 40 degrees from centerline. Keep amount of flexes to a minimum. Spread bend over entire neck of torch. Package of 1