Attributes . Rough Opening Diameter . Values

10 in (4)   10-1/2 IN (2)   12 1/2 in (4)   12 in (4)   14 in (3)   16 1/2 in (2)   18-1/2 in (4)   20 1/2 in (4)   24 1/2 in (4)   30-1/2 in (2)   36 1/2 in (4)   4 in (2)   42 1/2 in (2)   48 1/2 in (2)   6 in (4)   8 in (4)   Not Applicable (12)