We're now sold out of our long time favorite Azuma* Japan sockets so we were happy to hear that a premium socket manufacturer in China has stepped up to the plate to offer us a good alternative. Pure white unglazed ceramic body, gold plated contacts, nickel plated saddle and center grounding post. Mounts from the top of the chassis through a .715" hole, 1.125" mounting centers. Superior contact integrity. The bottom line? These brand new China manufactured sockets are not quite up to the ridiculous quality standards of the now gone and much missed Azuma factory but they're the next best thing if you can't hack the high price of the Amtrans replacements.