Grade T Twin Line Welding Hose, 3 8 in, 25 ft, BB Fittings, Fuel Gases and Oxygen no checkout Added carbon layer helps filter Added carbon layer helps filter out nuisance levels of ozone and organic vapors (less than OSHA PEL) For most welding applications HandyStrap® with buckle allows mask to comfortably hang around neck when not in use Ventex® valve lets the hot air out faster so workers stay cooler Provides a winning combination of versatility and performance Flexible Thermal Plastic Rubber (TPR) closure provides a secure fit to the wrist Reinforced thumb High quality Grade T twin line welding hoses Green hose carries oxygen to welding equipment Red hose carries fuel gases Hose cover resists flames and oils