The Sav-Ur-Fur patented Undercoat nozzle for undercoat removal. This will help save time and money. You need at least 60 psi to operate this nozzle. No Returns on Undercoat nozzles. They are special orders. Takes approx 2 hours to anodize to color. Can not be used with recirculating pumps of any kind. It will clog with hair.