Efficient twist-lock design eliminates oil leakage and blowing out of handle. In Dyno testing, engines equipped with our twist-lock dipstick pulled more vacuum than engines equipped with standard, non-locking dipstick. High temperature nylon handle dissipates heat for checking oil level on hot engines. Visual verification that cap is locked and prevents dirt and dust from entering tube Flexible stick; zinc-plated, bendable outer tube; adjustable clamp. 1/4" NPT steel, weld-in fitting supplied for pans that do not already have that provision. Existing "full" and "fill" dipstick marks can be used as-is, or new marks can be added to indicatedesired oil level. Tube and universal mounting tab can be bent or modified to accommodate engine compartment clearances and mounting location. A rubber capping seal keeps the dipstick secure in tube and prevents crankcase gasses from escaping. Dimensions: overall length, including exposed portion of dipstick - 24".