uxcell Plastic Blanking End Caps Square Tube Pipe Bung Insert 25mm x 25mm 100pcs Color: Black; Total Size: 25 x 25 x 18mm/ 1" x 1" x 0.7" (L*W*H) Material: Plastic; Net Weight: 295g Package Content: 100 (+/-2%) x Square Tube Insert Product Name: Square Tube Insert Thread Size: 23 x 23mm/ 0.9" x 0.9" (L*W)