For sale is a Quincy 5120 compressor head. I bought it from a bankrupt factory. The factory manager told me that it pumps air, however they had a pulley that tended to walk off the shaft. I do know that it pumps air because I spun the pulley with a wrench and felt the air being pumped. Maybe it was a bad pulley. Sold AS IS, in "nonworking condition" and NO RETURNS ARE ACCEPTED.