Shape:Round;Nominal Diameter:DN50;Height:60mm / 2.36 inches;Inner Diameter:63mm / 2 inches;Outer Diameter:72mm / 2.83 inches;Material:UPVC(Unplasticized Polyvinyl Chloride);Packing List:3pcs Atrium Grille Cover Benefits:UPVC connectors with thickened inner wall, smooth surface, no odor, neutral, lightweight, waterproof, not easy to corrode or crack, even with zero maintenance can be used for a long time. Note: Socket openings are glued with special UPVC glue (not included). Apply glue to inside and outside of pipe, then insert within 1 minute, set in 15 minutes, and use 24 hours later for best results. Applications:Atrium grates are placed at the top of drainage pipes to protect the drainage system from debris entry and clogging while allowing excess surface water to flow through. Widely used in wastewater, farm irrigation, mantle landscape beds, outdoor lawn areas, window wells and more. Note:Please check the correct size before ordering.