uxcell Plastic Square Blanking End Caps Tubing Tube Inserts 25x25mm 5 Pcs Product Mame : Square Tube Insert;Top Size : 25 x 25mm / 1" x 1"(L*W) Bottom Size : 18 x 18mm / 0.7" x 0.7"(L*W);Over Height : 17mm / 0.66" Material : Plastic;Color : Black Net Weight : 12g Package Content : 5 x Square Tube Insert