PGE 1/2-5/16 is union tee reducer push in fittings, T shape with a large size tube in the middle and two smaller size at both ends.
Pneuflex has official distributors in 30+ countries.
A Reliable Manufacturer - Composite Push in Fittings China

PGE 1/2-5/16 is union tee reducer push in fittings, T shape with a large size tube in the middle and two smaller size at both ends.
316 Stainless Steel Push in Fittings for Metric / Inch Tubing, PT, R, BSPT Connection Thread
316 Stainless Steel Push in Fittings for Metric / Inch Tubing, BSPP, G Male Thread
316 Stainless Steel Push in Fitting for Metric / Inch Tubing, NPT Connection Thread
316 Stainless Steel Push in Fittings for Metric / Inch Tubing, Metric (M) Connection Thread