PREMIUM MATERIAL: The dot air line fitting is made of high quality CA360 brass, meets D.O.T FMVSS 571.106 and Air Brake System Requirements. With corrosion resistance, high temperature ductility and low permeability. Long service use, dot air brake fitting type: 1/8" 1/4", 3/8", 1/2", 5/8" WORKING PRESSURE & TEMPERATURE: Air line fittings pressure resistance, not easy to trip. Air brake fittings working pressure from vacuum max to 300 PSI. Temperature Range: -65° F to +200° F EASY TO INSTALL: Our dot air fitting kit quicks disconnect push tubing in, you need to use tools to fix loose parts to handle in tight places so that use will be firmer and not easy to fall off. And pieces that contain a threaded end already have sealant pre-applied to provide a secure connection WIDELY APPLICATION: Air brake fittings assortment kit can be used with air systems, copper tubing in airline brake systems, which is perfect for automotive car or truck repair, air operated seats, operating gauges, air horns, industrial workshops, air brake connections, towing machine hose connection and air brake connections or lawn mower repair PACKAGE INCLUDES: The dot air brake fittings kit package includes 119pcs: 17pcs union connectors,5pcs tube tees,11pcs 90°elbows NPT Thread,10pcs straight male connectors NPT Thread, 14pcs hex bushing,2pcs schrader valve,60pcs sleeves ferrules,1pc 4m teflon tape HASAOMOI 119PCS DOT Air Brake Line Fittings, Brass Compression Air Nylon Tubing Fittings Assortment Kits, 6 Size 1/4" 1/8" 3/8" 1/2" 5/8" 5/16" for Truck or Industrial Air System