The PTC Manifold Union, a standard, compact fitting, is designed for polyurethane and nylon tubing, measuring 4 mm OD and crafted from composite (PBT) material. It's engineered for air fluid compatibility, operating within a 0 to 150 PSI pressure range. This versatile fitting features an O-Ring & Packing Material of NBR, a back ring of POM, and lock claws of Stainless Steel. The collar is made of Nickel-Plated Zinc Alloy. Its elliptical sleeve design ensures easy tube release, and it's compatible with hexagonal and Allen wrenches for tightening.