Constructed of forged brass and stainless steel to exacting Japanese specifications, the FN series valves are designed to provide a lifetime of dependable and reliable service. The size of the engine oil drain valve is 12 millimeters - 1.25. It replaces the drain plug for a quick, seamless, clean oil change. It is also ideal for drawing a small sample for any oil analysis. The f103n fumoto valve can attach a hose to its nipple joint. This can come in handy when dealing with tight spots or inaccessible, hard to reach areas. The f103n is commonly used on Toyota and Isuzu models. If you would like to use our product with a hose for automotive engines, but your vehicle has low ground clearance; we recommend using our s-type valve.