Mark I filament (EBIB03350)can be used in Mark Ion Beam equipment for optical coating. long useage time and perfect materials.

Materials        Tungsten     Diameter      0.33mm Overall Length     48.5mmTurns    3Package    10ea/bag MOQ    100pcs Our advantages:
1) Complete tungsten industry chain
(mine - powder - ingot - wire - filament)
2)  timely delivery guaranteed .