uxcell 4 Pcs Black Plastic 25x25mm Pipe Blacking End Caps Tubing Insert Square Product Mame : Tubing Insert;Top Size : 25 x 25mm/ 1" x 1"(L*W) Bottom Size : 17 x 17mm/0.7" x 0.7"(L*W);Mounting Size : 24 x 24mm/0.94" x 0.94"(L*W) Over Height : 16mm / 0.6";Material : Plastic Color : Black;Net Weight : 16g Package Content : 4 x Tubing Inserts