1 4 inch Npt Female Air Fittings Push to Connect FittingsCEKER 3 8 Inch Tubing Air Line Fittings Pneumatic Fitting Push in Connectors Quick Connect Air Hose Fittings 5Packs

CAUTION  1.The 1/4 npt air line fittings are primarily made for air and water (No Freezing). Other fluid types are highly prohibited. 2. The use of 3/8 Inch pneumatic connector is limited to areas that are highly prone to fire outrage 3. Don't use the pneumatic air line 3/8" od connections in areas whose water temperature is above 60'C 4. To avoid leakages and damage,you're advised to resist the temptation of adding extra loads to the 1/4 push lock fittings USER GUIDE  5.Carefully examine the 3/8 in tube fitting ends for a right angle cutting. Don't also forget to check the external 1/4 npt air tube connectors surface for any scratch. 6.Pneumatic composite should not be used for live swivel applications. 7.1/4 air hose fittings Body and collar are made of Nylon 6.6, gripping ring is stainless steel, and D seal and O-rings are Nitrile.