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| Innendurchmesser (mm) |
D |
USA/Kanada |
GB |
| inner diameter (mm) |
(Umfang/scope) |
(US ring size) |
(UK ring size) |
| 15,3 |
48 |
4.5 (4-) |
I 1/2 |
| 15,6 |
49 |
4.9 (4-) |
J |
| 15,9 |
50 |
5.3 (5) |
K |
| 16,2 |
51 |
5.7 (5-) |
K 1/2 |
| 16,6 |
52 |
6.1 (6) |
L 1/2 |
| 16,9 |
53 |
6.4 (6) |
M 1/2 |
| 17,2 |
54 |
6.8 (6-) |
N |
| 17,5 |
55 |
7.2 (7) |
O |
| 17,8 |
56 |
7.6 (7-) |
P |
| 18,1 |
57 |
8.0 (7-) |
P 1/2 |
| 18,5 |
58 |
8.4 (8) |
Q 1/2 |
| 18,8 |
59 |
8.7 (8-) |
R |
| 19,1 |
60 |
9.1 (9) |
S |
| 19,4 |
61 |
9.5 (9-) |
T |
| 19,7 |
62 |
9.9 (9-) |
T 1/2 |
| 20,1 |
63 |
10.3 (10) |
U 1/2 |
| 20,4 |
64 |
10.7 (10-) |
V |
| 20,7 |
65 |
11.0 (11) |
W |
| 21 |
66 |
11.4 (11) |
X |
| 21,3 |
67 |
11.8 (11-) |
X 1/2 |
| 21,6 |
68 |
12.2 (12) |
Y 1/2 |
| 22 |
69 |
12.6 (12-) |
Z 1/2 |
| 22,3 |
70 |
13.0 (12-) |
Z +1 |
