MQC12 fittings utilize a 3/8" male quick connect on one side and a 1/2" self sealing hose barb for rubber line on the other side. These fittings are commonly used to hook 1/2" I.D. rubber fuel line to female OEM 3/8" fuel line quick disconnects. Requires lubrication with oil on hose barb side to ease installation and avoid leaks. Always be sure to verify fitment before purchasing.
