uxcell 30pcs 25mm Diameter Black Plastic Blanking End Cap Round Tube Inserts Item Name : Round Tube Insert;Thread Diameter : 25mm/ 1" Total Size : 25 x 16mm/ 1" x 0.63"(D*H);Color : Black Material : Plastic Weight : 77g Package Content : 30 +/- 2% x Round Tube Insert