Neoprene Pigtails are constructed of oil-resistant neoprene rubber hose. Installing a lead-in will isolate high-vibration tools such as impact guns and air hammers from couplers, extending their life. FEATURES: Strong, Brass Fittings Ensure Durable Connection. Composed of Oil Resistant Neoprene. Working Pressure: 200 psi. Temperature Range: -40°F to 212°F. Made in USA.