QUICK CONNECTORS ARE DESIGNED FOR THE AUTOMOTIVE INDUSTRY FOR THE TRANSFER OF FUEL, OIL, WATER COOLING SYSTEMS AND AIR. 
PLEASE NOTE, THESE ARE NOT AUTO-SEALING.THIS TYPE DOES NOT HAVE A SHUT OFF MECHANISM BUILT IN.
Mix&Match Female/Male Fuel Line Quick Connector
 This listing is for high quality fuel line quick connect/disconnect fittings guaranteed for performance. This allows you to quickly connect the fuel lines by pushing-in and disconnect by simply pulling out while pressing the lock buttons. It is made of quality materials compatible with fuel/gas, and other common fluid types. The quick connectors do not have shutoff feature when disconnecting. They are compliant with SAE automotive standards. 

Please be sure to check out the listing images and the table below to pick the correct size/type needed. If you wish to form a pair with 1 female and 1 male, the connector size of the female piece and male piece must be exactly the same. Barb ends connect to either Nylon fuel hoses or rubber hoses.

Part number denotation - ID is usually denoted for Nylon hose. If you use rubber hose, the ID can be slightly larger. please checked out each picture for measurements. 

Specification: 
Body Material: PA12+30GF
O-Ring Material: FKM
Max Back Pressure: 500 KPa/5 Bar
Temperature: -40C-115C (-40F-239F)