This is a 40cm necklace made of platinum Pt850, featuring a precise design and high-quality materials. It has an adjuster that allows the length to be shortened to 38.5cm, offering two size options. Material: Platinum Metal: Pt850 Platinum Clasp: Spring ring clasp and plate Shape: Screw necklace Adjuster: Adjustable to 38.5cm Size: Length 40cm Width: Approximately 0.9mm Weight: Approximately 1g ± 0.05g Country of Manufacture: Japan (Made in Japan) Included: Jewelry box Jewelry cloth Thank you for your interest. Color: Silver系 (Silver-toned) Material: Platinum Decoration: None (Chain necklace) Included items: Box, warranty card