Caliber

Outside

Within

High

¹/4"

20

13

11

³/8"

20

15

11

¹/2"

36

19

11

³/4"

40

24

11

1"

48

30

11

1¹/4"

48

38

12

1¹/2"

58

44.5

14

2"

70

56.5

15

3"

105

87

20

4"

135

110

30