This is the female half for our Quick-Drain Oil Pan Couplers. It will fit any male Quick Drain Pan Coupler (sold separately). Simply connect this coupler to the male pan fitting to drain your oil. The hose barb allows you to install 5/8" ID rubber hose so you can direct the oil around obstructions to minimize spills. Measures 2 3/8" long to the end of the barb. Release collar measures 1 1/2" OD.