Aid and Trade

Wholesale Price:     $1.00

1/4" calendar binding/6.4mm calendar binding rings
Double ring binding


size

Pitch(mm)

 

inches

mm

inches

mm

pages(80g)

1/4

6.4

3:1

3/16

4.8

45

5/16

7.9

3:1

1/4

6.4

60

3/8

9.5

3:1

5/16

7.9

75

7/16

11

3:1

3/8

9.5

85

9/16

14.3

3:1

1/2

12.7

120

1/2

12.7

3:1

7/16

11.1

100

5/8

16

3:1

9/16

14.3

135

5/8

16

2:1

9/16

14.3

135

3/4

19

2:1

5/8

17.5

165

7/8

22.2

2:1

3/4

20.6

180

1

25.4

2:1

7/8

23.8

200

1-1/4

31.8

2:1

1

25.8

220