Inch
mm
A
1/2"
15
20.0
3/4"
20
24.0
1"
25
28.0
1.1/4"
32
33.0
1.1/2"
40
36.0
2"
50
41.0
2.1/2"
65
48.0
3"
80
53.0
4"
100
64.0