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Diagram of item goes here.

Size A

B

3" 7 1/2" 7 1/4"
4" 8 1/2" 8 1/4"
5" 9 1/2" 9 3/8"
6" 10 1/2" 9 1/4"
7" 11 1/2" 11 3/4"
8" 12 1/2" 12 3/4"
10" 17 1/2" 16"
12" 19 1/4" 18 3/4"
14" 24" 23"
16" 26" 19 1/2"
18" 30" 21 1/2"
20" 34" 23 1/2"
22" 36" 25 1/2"
24" 39" 27 1/2"
26" 44" 29 1/2"
28" 48" 31 1/2"
30" 50" 33 1/2"