EK-AF FillPort is a panel mounted adapter, primarily designed as an extension to reservoir to function as a service port. This adapter fitting allows easier topping-off and can alternatively also serve as a drain-port.This adapter is equipped with one standard female G1/4\" port and is closed-off by enclosed G3/8\" Plug, required Allen Key is also enclosed.Made from nickel-plated CNC machined brass.Specification:- Threading: 1 x G1/4\"- Plug: 1 x G3/8\"- Thread length: 7.0mm- Diameter: 33.0mm- Height: 27.0mmROHS 2.0 compliant!