uxcell 24 Pcs Black Plastic 25x25mm Square Pipe Blacking End Caps Tube Insert Product Mame : TubingInsert;Top Size : 25 x 25mm/ 1" x 1"(L*W) Inner Size : 17 x 17mm/0.67" x 0.67"(L*W);Fit for Mounting Size : 24 x 24mm/0.94" x 0.94"(L*W) Over Height : 16mm / 0.6";Material : Plastic Color : Black;Net Weight : 88g Package Content : 24 x TubingInserts