Concoa 806-5502 Acetylene Single Stage RegulatorCGA300 cylinder connection for Airco style cylinders 2" gauge 8611017 & 8611050 30# red line Delivery 0 - 15* PSIGFor Medium duty welding, cutting, heating and brazing Found in 840-2266, 840-0066 Kits Replaces 806-9302 & 806-8302 Old Airco Number 0806-5502