This is a replacement float ball for the Blichmann AutoSparge. It is all stainless steel and well made, just like all of Blichmann's offerings.
The AutoSparge level and flow control system is an awesome accessory for RIMS systems, and it also works great with gravity systems or with pumps! Wort gently rotates on top of the grain bed to reduce channeling and oxygen pick-up, and to increase extraction efficiency. With a constant hot liquor level over your grain bed, complicated rotating sparge arms are unnecessary!