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01429 273061
Product Detail
UK USA French / German Italian Circumference (mm) Diameter (mm)
A 39 37.7 12    
A 1/2 39.5 38.33 12.2    
B 40 38.96 12.4    
B 1/2 0.75 40.8 39.58 12.6  
C 1.25 41.25 40.53 12.9  
C 1/2 1.5 41 1 41.15 13.1
D 1.75 42 2 41.78 13.3
D 1/2 2 42.5 2.5 42.41 13.5
E 2.25 43.5 3.5 43.04 13.7
E 1/2 2.5 44 4 43.67 13.9
F 2.75 44.5 4.5 44.3 14.1
F 1/2 3 45 5 44.92 14.3
G 3.25 45.5 5.5 45.55 14.5
G 1/2 3.5 46 6 46.18 14.7
H 3.75 47 7 46.81 14.9
H 1/2 4 47.5 7.5 47.44 15.1
I 4.25 48 8 48.07 15.3
I 1/2 4.5 48.5 8.5 48.69 15.5
J 4.75 49.5 9.5 49.32 15.7
J 1/2 5 50 10 49.95 15.9
K 5.25 50.5 10.5 50.58 16.1
K 1/2 5.5 51 11 51.21 16.3
L 5.75 52 12 51.84 16.5
L 1/2 6 52.5 12.5 52.46 16.7
M 6.25 53 13 53.09 16.9
M 1/2 6.5 54 14 53.72 17.1
N 6.75 54.5 14.5 54.35 17.3
N 1/2 7 55 15 54.98 17.5
O 7.25 55.75 15.75 55.61 17.7
O 1/2 7.5 56.25 16.25 56.23 17.9
P 7.75 57 17 56.86 18.1
P 1/2 8 57.25 17.25 57.49 18.3
Q 8.25 58 18 58.12 18.5
Q 1/2 8.5 58.5 18.5 58.75 18.7
R 8.75 59.5 19.5 59.38 18.9
R 1/2 9 60 20 60 19.1
S 9.25 60.5 20.5 60.63 19.3
S 1/2 9.5 61.25 21.25 61.26 19.5
T 9.75 62 22 61.89 19.7
T 1/2 10 62.5 22.5 62.52 19.9
U 10.5 63 23 63.15 20.1
U 1/2 10.5 64 24 63.77 20.3
V 10.75 64.25 24.25 64.4 20.5
V 1/2 11 65 25 65.03 20.7
W 11.25 65.5 25.5 65.66 20.9
W 1/2 11.5 66.5 26.5 66.29 21.1
X 11.75 67 27 66.92 21.3
X 1/2 12 67.5 27.5 67.54 21.5
Y 12.25 68 28 68.17 21.7
Y 1/2 12.5 69 29 68.8 21.9
Z 12.75 69.5 29.5 69.43 22.1
Z 1/2 13 70 30 70.06 22.3