uxcell Plastic Square Tube Inserts End Blanking Caps 19mm x 19mm 10 Pcs Black Product Mame : Square Tube Insert;Total Size : 20 x 20mm / 0.8" x 0.8" (L*W) Fit for Mounting Size : 19 x 19mm / 0.75" x 0.75" (L*W);Over Height : 18mm / 0.7" Material : Plastic;Color : Black Net Weight : 35g Package Content : 10 x Square Tube Inserts