Plastic Square Caps Tubing Tube Inserts 20mm x 20mm Bottom Size 40 Pcs Item Name : Square Tube Insert;Total Size : 20 x 20mm / 0.8" x 0.8" (L*W) Total Height : 15mm/0.6";Color : Black Material : Plastic Weight : 78g Package Content : 40 x SquareTube Inserts