This is a complete install kit for adding a mechanical oil pressure gauge to your car, truck, or hot rod. It includes a 72-inch long (6 feet) copper line with a 1/8-inch diameter, plus all the necessary fittings and adapters. Part number AG96 (also fits 3224). Brand is Sherco-Auto. Mechanical gauges are known for being accurate and reliable because they use a direct tube from the engine. Perfect for classic cars, race cars, or any vehicle where you want to monitor real oil pressure. The copper line is flexible and durable. Installation involves routing the line from the engine block to the gauge inside the cabin. A great upgrade over factory dummy lights or weak electric gauges. Know exactly what your engine's oil pressure is doing. Essential for performance engines or peace of mind in an older vehicle. DIY-friendly with some mechanical knowledge. Get the kit and install a true performance gauge.