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CK Worldwide uses a unique head assembly that provides the largest water jacket available in an 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). Package of 1 Warning: This product contains chemicals known to the state of California to cause cancer and birth defects or other reproductive harm.