QDB10 Inc.: QDB11, QDB12, Price Each (part# QDB10) Torch-to-Hose Set w/Check Valves Hose-to Hose Set w/Check Valves Regulator-to-Hose Set w/Check Valves This item features: -Brass construction provides long service life. -Non-interchangeable oxygen and fuel gas connectors. -Instant closure on reverse flow check valves. -Spring-loaded locking mechanism responds to fingertip action and achieves a gas-tight connection. -Double seal socket connection on second seal. -Gas Type: Fuel Gas, Oxygen/Inert Gas. -Material: Brass. -Type: Quick Connect. Testing and approvals: -Exceed CGA flow specifications.