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. Specification:Color: GreyMaterial: PVC (Polyvinyl Chloride)Shape: StraightHeight: 108., 51mm / 4., 27 inchBig Diameters: 105., 37x90mm / 4., 15x3., 54 inch (OD*ID)Small Diameters: 76., 04x63mm / 2., 99x2., 48 inch (OD*ID)Package Content: 1 x Reducer FittingAdvantage:PVC connectors with high strength, weather resistance, lightweight, moisture resistance, wear resistance, chemical corrosion resistance. Application: Reducing pipe fittings are great for connecting two unthreaded plumbing pipes in different outside diameters requiring high tensile and impact strength 2 Pvc Pipe 6 Pvc Coupling PATIKIL PVC Reducer Pipe Fitting 90x63, Straight Coupling Adapter... Sprinkler Line Coupler PVC Reducer Fitting Notice: Please confirm the correct size before ordering., Shape: Straight; Height: 108., 51mm / 4., 27 inch; Big Diameters: 105., 37x90mm / 4., 15x3., 54 inch (OD*ID); Small Diameters: 76., 04x63mm / 2., 99x2., 48 inch (OD*ID); Package Content: 1 x Reducer Fitting Please confirm the correct size before ordering. Reducing pipe fittings are great for connecting two unthreaded plumbing pipes in different outside diameters requiring high tensile and impact strength. Advantage: PVC connectors with high strength, weather resistance, lightweight, moisture resistance, wear resistance, chemical corrosion resistance. METALLIXITY Duct Reducer, (2 to 1/2 Inch), PVC Pipe Increaser DWV Re Instruction:The socket openings are bonded by UPVC special glue (NOT included here).