Blanking End Caps 3/8" Dia Plastic Round Tubing Tube Inserts 12 Pcs Item Name : Round Tube Insert;Thread Diameter(Each) : 10mm/ 3/8" Total Size : 13 x 5mm/ 0.5" x 0.2"(D*H);Color : White Material : Plastic Weight : 6g Package Content : 12 x Round Tube Insert