QDB11 Model Code: AA (part# QDB11) Torch-to-Hose w/Check Valve Hose-to-Hose w/Check Valve Regulator-to-Hose w/Check Valve Regulator-to-Hose Connect Hose-to-Machine Connect 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. -Material: Brass. -Type: Quick Connect. -Price is for 1 Each. Testing and approvals: -Exceed CGA flow specifications. Model Code Model Description AAGas Type:Fuel Gas, Connection Type:QDB200 - Male Plug, QDB201 - Female Socket ABGas Type:Fuel Gas, Connection Type:QDB205 - Male Plug, QDB201 - Female Socket ACGas Type:Fuel Gas, Connection Type:QDB205 - Male Plug, QDB206 - Female Socket ADGas Type:Inert Gas, Connection Type:QDB300 - Male Plug, QDB301 - Female Socket AEGas Type:Inert Gas, Connection Type:QDB302 - Male Plug, QDB303 - Female Socket AFGas Type:Oxygen/Inert Gas, Connection Type:QDB100 - Male Plug, QDB101 - Female Socket AGGas Type:Oxygen/Inert Gas, Connection Type:QDB105 - Male Plug, QDB101 - Female Socket AHGas Type:Oxygen, Connection Type:QDB105 - Male Plug, QDB106 - Female Socket