uxcell 100mm x 100mm Plastic Ribbed Square End Caps Cover Tube Inserts 2 Pcs Product Mame : Square Tube Insert;Top Size : 100 x 100mm / 3.9" x 3.9"(L*W) Thread Size : 99 x 99mm / 3.9" x 3.9"(L*W);Overall Height : 26mm / 1" Material : Plastic;Color : Black Net Weight : 108g Package Content : 2 x Square Tube Insert