【Package Include】MuHize upgrade push to connect pneumatic tube fitting (pack of 40): ①12Pcs Straight ( 4x1/2", 4x3/8", 4x1/4"); ②9Pcs Elbow ( 3x1/2", 3x3/8", 3x1/4"); ③5Pcs Male Elbow ( 3x3/8" Tube x1/4" NPT, 2x3/8" Tube x3/8"NPT); ④6Pcs Tee Union ( 4x1/4",2x3/8") ; ⑤8Pcs Male Straight ( 2x1/4"OD x 1/4"NPT, 2x3/8"OD x 1/4"NPT, 2x3/8"OD x 3/8"NPT, 2x1/2"OD x 3/8"NPT). These are perfectly sufficient for you to choose. 【High Quality】MuHize air hose repair kit is made of high quality plastic and are widely used for automatic industry, workshop equipment, auto repair, decoration spray paint,woodworking, dental equipment, etc. 【Easy to Install】MuHize quick connect air hose fitting is easy to install, flexible, space saving, 360 degree free rotation, and the release ring adopts oval design, which can be easily removed. 【Working Pressure& Temperature】Air fittings working pressure:0-1.2mpa | 0-174psi; Temperature: -20°C-60°C | -4°F~140°F. 【Widely Application】Pneumatic fittings kit can be used to transmit air, water, vacuum,etc. Push to connect tube fitting is used for connecting tubes (PU / PA / PE / PVC)without additional sealing( Teflon tape pre-installed) for safe tube use. MuHize pneumatic fittings kit is easy to install. Pushfit straight coupling kits are easy to install, you just need to insert the pipe into the fitting deep enough by hands without soldering, clamps or glue required. Push to connect fittings air fittings can even be rotated after assembly for easier installation in tight spaces.You can easily change the tubing connector direction. Pneumatic push to connect fittings kit Working Pressure:0-1.2mpa | 0-174psi; Temperature: -20°C-60°C | -4°F~140°F. After completing the connection, please gently pull the tube and make sure that it is completely connected without falling off. Package includes: 12Pcs Direct Push Reducing Hose Fittings ( 4x1/2", 4x3/8", 4x1/4) 9Pcs Elbow Shape Tube Fittings Push Lock ( 3x1/2", 3x3/8", 3x1/4) 5Pcs Male Elbow Push to Connect Fittings ( 3x3/8" Tube x1/4"" NPT, 2x3/8"Tube x3/8"NPT) 6Pcs Direct Push Pneumatic Reducing Tee ( 4x1/4",2x3/8") 8Pcs Straight Push-in Connect Fittings ( 2x1/4"OD x 1/4"NPT, 2x3/8"OD x 1/4"NPT, 2x3/8"OD x 3/8"NPT, 2x1/2"OD x 3/8"NPT) Notice 1. Pneumatic fittings kit can be used to transmit air, water, vacuum,etc. 2.The cut of the air line hose must be completely clean and cut straight without chips or crumbs. The profile of the air tube must be Round. No eliptical or other form.