Product Details1.Made of PVC material, the adapter is waterproof, corrosion resistant, and flame retardant. It is well insulated and can be used as a connector for wire conduits. Three-way joint can connect three pipes at the same time.2.Inner Diameter: 20mm / 0.8 inch; Outer Diameter: 24mm / 0.9 inch; Total Size: 50 x 37mm / 2 x 1.5 inch (L*H); In the package of: 20 x PVC Conduit Coupler3.Fittings are components used in many industries to connect, terminate, control flow, and change the direction of pipes. This conduit coupler not only applies to indoor or outdoor conductive pipe connection, but is also suitable for agricultural irrigation, cultivation systems, furniture, shelves and is also good for display racks.4.When the conduit tube is connected, under the force of the tapered wall, the expansion pressure will be generated.