uxcell Hard Plastic Round Tubing Tube Insert Blanking End Caps 38mm 20Pcs Product Mame : Round Tube Insert;Top Diameter : 38mm / 1.5" Bottom Diameter : 28mm / 1.1";Over Height : 15mm / 0.59" Material : Plastic;Color : Black Net Weight : 81g Package Content : 20x Round Tube Insert