this is ordinary welded link chain and absolutely gaurantee good quality and lowest price Feature: 1, Material: Q235 ... Mild Steel Link Chian: including short link chain, Medium link chain and Long link chain; Wire Diameter: 1/8", 5/32 ... ,5.5mm,6mm,7mm to 25mm DIN764 LINK CHAIN: Wire Diameter: 4mm,5mm,6mm,8mm,10mm, ... 12mm,13mm,14mm,16mm,18mm to 25mm DIN766 LINK CHAIN: Wire Diameter: 3mm, 4mm,5mm,6mm,7mm ...