For sale is a BROKEN Electro Craft S 4075 R H00AA AC Servo. Out of the seven servos that I bought at that bankrupt factory, I was told that only this one is BAD, so I marked it as such. I did not even bother testing it. It is sold as non-working, parts only unit, with NO RETURNS and NO REFUNDS under ANY circumstances. Maybe you want to open it up and see how servos work, or try your repair skills, etc.