5mm to 4mm Dia Rotatable Universal Joint Connector for RC Model Boat Product Name : Universal Joint;Type : 5mm to 4mm Side Thread Diameter : 3mm/ 0.12";Ovall Size : 2.3 x 1.1cm/0.9" x 0.43"(L*D) Material : Metal;Color : Silver Tone Net Weight : 12g Package Content : 1 x Universal Joint