KVK This is a reverse plumbing socket. Pitch: 87mm to 102mm This socket is for installation on faucets where the hot and cold water lines are reversed. It is not a simple extension socket, so please be sure you understand this. We have confirmed there were no leaks before removal. Please refrain from reporting any issues after purchase. This is a used item, so there may be minor scratches. Packing is not included, so please purchase it at a home center, etc.