uxcell 4Pcs Square Multi-Gauge Dome Insert Black 25x25mm for Box Section Tube Product Mame : Square Dome Inserts;Top Size : 25 x 25mm / 1" x 1" (L*W) Bottom Size : 15 x 15mm / 0.6" x 0.6" (L*W);Total Height : 26mm /1" Material : Plastic, Metal;Color : Black Net Weight : 30g Package Content : 4 x Square Dome Inserts