Description: Made of Nylon66 material, durable, with good corrosion resistant.Easy to install, used for thread connection. Specifications:Color: BlackMaterial: NylonType: M20 Outer Thread to M25 Inner ThreadTotal Size: 32 x 25 mm / 1.26 x 1.00inch(D*L) Outer Thread Diameter: 19.6mm / 0.77"Outer Thread Length: 7.5mm / 0.30"Inner Thread Diameter: 23.6mm / 0.93"Inner Thread Length: 12mm / 0.47" Packing Included:1 Pcs x Threaded Bushing