U-WELD all gas cutting & welding products should only be used by well-trained professional technicians.Using before raed the operation manual. Misoperation of these products could cause series injuries evendeath due to high pressure and hazardous gases.U-weld reserves the right to change of any products design, materials,or specifications without notice.U-weld suggests using regulators and torches together with flashback arrestors or check valves.