Plastic pneumatic fittings, one touch fittings, push fit fittings, tubing fittings, only need to push in to connect the PA and PU tubes, which is very convenient to installation and removal in the pneumatic system. The fittings for the tube from 3mm to 16mm,1/8 inch to 1/2 inch; Thread size including BSPP, BSPT, NPT, and metric thread. REAYON PNEUMATIC always provides fittings with competitive prices and excellent quality.