uxcell 12Pcs White Plastic 12mm Dia Round Tubing Tube Insert Caps Covers Item Name : Round Tube Insert;Thread Diameter(Each) : 12mm/0.47" Total Size : 16 x 7mm/ 0.63" x 0.3"(D*H);Color : White Material : Plastic Weight : 6g Package Content : 12 x Round Tube Insert