Plastic Square Tube Inserts End Blanking Caps 100mmx100mm 4pcs Black Product Mame : Square Tube Insert;Top Size : 100 x 100mm / 3.9" x 3.9" (L*W) Bottom Size : 78 x 78mm / 3" x 3" (L*W);Total Height : 25mm /1" Material : Plastic;Color : Black Net Weight : 203g Package Content : 4 x SquareTube Inserts