uxcell Plastic Square Tube Inserts End Blanking Cap 19mm x 19mm 20 Pcs Black Product Mame : Square Tube Insert;Top Size : 19 x 19mm / 0.75" x 0.75" (L*W) Bottom Diameter : 11mm / 0.43";Over Height : 18mm / 0.71" Material : Plastic;Color : Black Net Weight : 65g Package Content : 20 x Square Tube Inserts