uxcell Screw Type Round Caps Tube Insert Cover 50mm Dia 4 Pcs Black Item Name : Round Tube Insert;Thread Diameter(Each) : 40 x 44mm/ 1.57" x 1.73"(ID*OD) Total Size : 50 x 17mm/ 2" x 0.67"(D*H);Color : Black Material : Plastic Weight : 25g Package Content : 4 x Round Tube Insert