Parker Prestolok metric metal fittings feature ease of assembly and disassembly using push-to-connect technology. A stainless steel grab ring in conjunction with an acetal locking collet secures Prestolok tubing connections. Male connectors have a white acrylic sealant pre-applied from the factory. Ideal for use with many types of polytubing.Parker Prestolok metal fittings feature ease of assembly and disassembly using push-to-connect technology. A stainless steel grab ring in conjunction with an acetal locking collet secures Prestolok tubing connections. Male connectors have a white acrylic sealant pre-applied from the factory. Ideal for use with many types of polytubing. Product Specifications Item: Push-to-Connect Metric Union Tee Brand: Parker Model: JPB4 Size: 4mm Tube X 4mm Tube X 4mm Tube Type: Prestolok Material: Nickel Plated Brass/Acetal Release /SS Grab Ring Max Pressure: 300 PSI PART NUMBER QUANTITY PRICE JPB4 3 9.06 JPB6 6 9.30 JPB8 4 10.78