These are standard, cast iron 4 bolt Flanges
There are several bearings that can be assembled with these housings: ie:
SA 208 and SA208 series ( locking collar), SB208 and SB208 series( set screw) singly extended inner ring bearings, flush on the other side.
UC208 series (set screw) doubly extended inner ring.
These are NOT suitable for HC208 series.
THESE ARE LIMITED TO 80MM OD BEARINGS
THIS IS THE HOUSING ONLY. NO BEARING IS INCLUDED.