uxcell Plastic Square Tubing Tube Insert Blanking End Cover Caps 30mm x 30mm 10 Pcs Product Mame : Square Tube Insert;Size : 30 x 30mm/1.2" x 1.2"(L*W) Fit for Mounting Size : 29 x 29mm /1.1" x 1.1"(L*W);Over Height : 16mm/0.63" Material : Plastic;Color : Black Net Weight : 32g Package Content : 10 x Square Tube Inserts