These are standard, cast iron 4 bolt Flanges
There are several bearings that can be assembled with these housings: ie:
SA 201 and SA202 series ( locking collar), SB201 and SB202 series( set screw) singly extended inner ring bearings, flush on the other side.
THESE ARE LIMITED TO 40MM OD BEARINGS
THIS IS THE HOUSING ONLY. NO BEARING IS INCLUDED.