This hose is designed for portable or production line welding in factories, ships, construction work, etc. Meets or exceeds RMA and CGA (Compressed Gas Association) specifications for type VD (vulcanized double), Grade T welding hose The cover is oil and flame resistant with a tube that is non-blooming For use with all fuel gases.Cover: Green (oxygen), Red (fuel) Neoprene Tube: Black SBR Reinforcement: Multiple textile spirals Temp. Range: -40° F to +200° F 1/4" diameter hose BB size fittings 50 foot lengthWarning! Care should be taken to avoid gouging, dragging, abrading or otherwise damaging the hose cover, which may also lead to premature hose failure. Do not attempt to repair or re-couple hose assemblies; replace all assemblies that show signs of age or abuse. Refer to RMA IP-11-5, "Welding Hose,Precautions for the Selection and Use of". Warning! Bleed hoses when not in use for 30 minutes or longer.