uxcell 12 Pieces 74mm Diameter Black Plastic Blanking End Cap Round Tubing Tube Inserts Item Name : Round Tube Insert;Thread Diameter : 72mm/2.8" Total Size : 74 x 18mm/2.9" x 0.7"(D*H);Color : Black Material : Plastic Weight : 245g Package Content : 12 x Round Tube Insert