From a closing industrial facility. Untested. We are not familiar with this part type, and it seems like some of these do not have the same cable that comes with comparable listings. Otherwise though, there is no reason to expect these are not working, as they came with a bulk purchase from a closing machine shop whose machines were still functional. Due to the uncertainty and the excellent price (the cheapest eBay comp is a used single for $25-30 once shipping is included) we are selling the lot as-is, for parts.