I'm selling these at a low price because I purchased a large quantity. Direct sale from the craftsman. This necklace is 1.3mm wide. I also have 1.1mm width available. Brand new, unused. Total length: Approximately 50cm Chain width: Approximately 1.3mm Weight: Approximately 1.48g Plate width: 3.1mm K18 Yellow Gold K18 stamp present This is genuine 18K gold, not plated. Purchased from a chain shop in Okachimachi. Made in Japan, produced in a domestic factory. The screw chain, as the name suggests, has a spiral design. It's like a spiral staircase in appearance. It's a delicate size suitable for women, but men can also wear it for a stylish, understated look. The opening of the round clasp, which is the most likely part to break, is also welded for peace of mind. I also have 40cm and 45cm lengths available. Other lengths are also available upon request. Accessories Rings k10 18K pt Diamond 18K gold ring 18K gold necklace 18K gold pendant 18K gold bracelet Material: Gold Color: Gold Material: K18 (18K gold)