24 Pcs Black Plastic 40mm Dia Round Tubing Tube Insert Caps Covers Item Name : Round Tube Insert;Thread Diameter(Each) : 40mm/ 1 5/8" Total Size : 40 x 18mm/ 1.6" x 0.7"(D*H);Color : Black Material : Plastic Weight : 155g Package Content : 24 x Round Tube Insert