The Harris Model 42-4F is a medium duty straight cutting torch designed to provide maximum performance using low-cost alternate fuel gases. Our special "F" injector produces the hottest flame possible at the lowest gas pressures (4 oz. - 2 lbs.), making is the safest, most efficient design in the industry. The Harris 42-4E is a Lightweight 6" Capacity Cutting Torch with all the features that made Harris famous.