This is a Serpent collar from the now-defunct sp-love. It was a very popular brand, used in films starring Mitsuki Tanimura, but the brand disappeared about 5 years ago, so it's no longer available. While black ones are widely sold, white ones are rare. The inside is made so that no metal is exposed, making it gentle on the skin. The design has the feel of being the origin of many collars available today, and because this one could be finely semi-customized, it gives the impression that many famous figures in the SM world, such as Satsuki Ryu and Ero-Ouji-sama, used it. As I am retiring from being a player, there are some signs of use, such as candle wax marks and whip marks, but it's a shame and a waste to keep such a valuable item in storage, so I've decided to give it away this time. I will carefully package it and send it to you, but it may be packed small. Please stretch it out after it arrives. Please be sure to read my profile before purchasing. I hope that those who love SM or those who are active queens will use it.