Push to Connect Tube Fitting Straight Pneumatic Connectors for 4mm OD Tube 2pcs

Designed for Polyurethane or Nylon tubing.
A good release cap can withstand greater and stronger pressure without tripping.
Have flexibility, abrasion resistance, light weight, and resistance to crushing and cracking,Compressive and corrosion resistant, good sealing performance and long service life.
Easy to install, insert the plastic tube, the cap can be rotated freely, but its rotation is only used when the angle is wrong when the joint is installed.