Attributes . Frame Opening Width . Values

10 in (2)   12 1/2 in (2)   12 in (2)   16 1/2 in (2)   18 in (2)   18-1/2 in (2)   20 1/2 in (2)   20 in (2)   24 1/2 in (2)   24 in (2)   30 in (2)   36 1/2 in (2)   36 in (2)   42 1/2 in (2)   48 1/2 in (2)   Not Applicable (12)