This is a collaboration between NILøS and IKE. It is a limited edition of 418 items, each engraved with a number from 001 to 418. I will refrain from mentioning the specific number for security reasons, but please check the 6th image to confirm that it is a two-digit number. Also, due to the nature of the product, some unevenness may be visible. I think it can be used by both men and women. Please understand that this is a used item before purchasing. Product number: IKE004 Color: Silver Material: Brass NILøS NILøS JULIUS JULIUS SPYAIR IKE necklace necklace