These are standard, cast iron 4 bolt Flanges
There are several bearings that can be assembled with these housings: ie:
SA 207 and SA207 series ( locking collar), SB207 and SB207 series( set screw) singly extended inner ring bearings, flush on the other side.
UC207 series (set screw) doubly extended inner ring.
These are NOT suitable for HC207 series.
THESE ARE LIMITED TO 72MM OD BEARINGS
THIS IS THE HOUSING ONLY. NO BEARING IS INCLUDED.