Union pipe fittings are great for connecting two unthreaded plumbing pipes in different outside diameters requiring high tensile and impact strength. Widely used in building construction, bathrooms, kitchens, sinks, laboratories, etc. Specification: Color: Grey Material: UPVC (Unplasticized Polyvinyl Chloride) Shape: Straight Height: 78mm / 3.07 inch Inner Diameter: 50mm / 1.97 inch Outer Diameter: 62.8mm / 2.47 inch Max Diameter: 97mm / 3.82 inch Package Content: 1 x Union Fitting Advantage: UPVC rotatable connectors with EPDM sealing o-rings feature smooth surface, odorless, neutral, lightweight, and watertight, do not corrode or crack easily and last for a long time even with zero maintenance. Instruction: The socket openings are bonded by UPVC special glue (NOT included here). Apply glue on the inside and outside of the pipe, then insert within 1 minute, set in 15 minutes, and use after 24 hours for better effect.