These cast aluminium temperature adaptors fit in-line in an oil hose and allow wither a mechanical or electrical sender to be installed. Our standart sender port is 5/8 UNF and can be used with the reducing bushes above to allow for other threads to be installed. We list all common sizes, but if we do not have a size listed that is suitable for your application, please call or email and we will be happy to help you find the part you need.