Saftronics DC6-350-4 Stack, 480V 0-500Vdc. Condition is Used. There are three drives here one is put together for the most part the other two have been taken apart, several main boards included, Drives functioned when removed from service we just decided to upgrade everything all at once and kept these around for a year or so just in case we had problems but now they need to get off of my shelf some aux equipment like fans are missing. No Warranties, you'll need a little dc drive knowledge to put the other two back together. There are a few spare parts included also like extra heat sensors.