Technical description Durable ribbed outer rubber made of SBR/NR with good weather and ozone resistance, black inner tube of SBR/HSBR/NR and polyester inserts. Red outer rubber: acetylene, Blue outer rubber: oxygen. Meets ISO 3821 and EN 559 requirements A lightweight and flexible hose for welding gases, but can also can be used as a compressed air hose. Material SBR(Styrene Butadiene Rubber /NR (Natural Rubber) Working pressure Maximum recommended working pressure is 20 Bar Temperature range -30 - +70°C