Glass Filament Diameter

Fiber Designation Nominal Filament Nominal Filament 
Glass-Cut  Diameter (Microns) Diameter (Inches)
B 3.5 0.00012
C 4.5 0.00018
D 5 0.00021
DE 6 0.000256
E 7 0.00028
G 9 0.00037
H 10 0.00043
K 13 0.0005