Standard Valve: These non-nipple valves can simply allow you to drain the oil. No hoses can be used, but their sizes are at minimum, and, compared to the regular drain plugs, they would only be added half inches in length from your oil pans.
N-Series Valves: These valves have 15mm hose nipples in length. We recommend using these valves on industrial engines and vehicles with high ground clearance. *NOT RECOMMENDED FOR VEHICLES WITH LOW GROUND CLEARANCE.