20pcs Zinc Alloy Spring Ring Metal Open Bag Webbing Keychain, Specification: 4 Points Black

1. Material: zinc alloy2. Suitable for: bag chain making, key chain making DIY3. Wear-resistant and corrosion-resistant, high hardness4. Not easy to break, long service life5. Suitable for making various key rings6. Outer diameter: 3 points 17.5 mm; 4 points 20 mm; 5 points 24 mm; 6 points 27.6 mm; 1 inch 34 mm; inch 2 40 mm7. Inner diameter: 3 points 11 mm; 4 points 12.6 mm; 5 points 16 mm; 6 points 19 mm; 1 inch 24.5 mm; inch 2 30 mm8. Line thickness: 3 points 3.5 mm; 4 points 3.5 mm; 5 points 4 mm; 6 points 4.5 mm; 1 inch 4.5 mm; inch 2 4.8 mm9. Weight: 3 points 2.6 grams; 4 points 3.1 grams; 5 points 5 grams; 6 points 7 grams; 1 inch 9.6 grams; inch 2 12.5 grams