This is a pre-assembled black oil line in fixed length, with female swivel fittings installed. Used in Pre-Twin Cam applications in stock or custom applications. Just purchase the correct length oil line, plus the right oil line fittings for your application, and you'll have a set of oil lines to challenge all others in quality, fit and finish. Comes with black outer and PTFE lined inner hose. Note: Oil line has black -6 JIC swivel fittings pre-installed and will fit the oil line fittings mentioned below. Note: Oil line length mentioned is the distance between the internal flares of the female swivel fitting. Actual overall length of the hose is 2" longer than mentioned. Note: Oil line fittings are black. With -6 JIC connection, on oil line side and a 1/8" NPT (approx. 10mm in diameter, as in oil tank and oil pump) or 1/4" NPT (approx. 13.5mm in diameter) thread to fit regular H-D applications. Order oil line fittings separately as required