vpc pneumatic fittings are suitable for any tubes.
easy steps to take tubes off
all R and NPT threads are pre-coated sealant

Summary:

VPC pneumatic fittings are used in pneumatic piping.The tube fittings come in a variety of models to meet all your needs in pneumatic piping.Even after installation, the direction of the tube can be changed freely. 

Nickel-plated metal body ensures anti-corrosion and anti-contamination. 

All R and NPT threads are pre-coated sealant.

Suitable for any tubes.Easy steps to take tubes off.Once inserted to the nut,the tube would not easily loose.Nickel-plated metal body ensures anti-corrosion and anti-contamination.All R and NPT threads are pre-coated sealant.Quick and simple tube insertion.Compact,lightweight design.Advanced, well-proven tube retaining system.Re-usable thread seal

Specifications: 

Fluid	Air
Operating pressure	0 ~150PSI	0~9Kgf/cm2(0900kPa)
Negative Pressure	-29.5in Hg	-750mm Hg(10 Torr)
Operating temperature	32~140o F	0~60oC
Tube material	Polyurethane and Nylon