Grade: 99%, 99.9%, 99.95%
Size: -40mesh, -80mesh, -100 mesh, -325mesh, and etc.

Special requirement is welcome!

Main content (% min.)	Impurities (% max.)
Nb+Ta	Ta	C	O	N	W	Mo	Ti	Si	H	Fe
99.95	0.15	0.006	0.015	0.01	0.006	0.005	0.005	0.003	0.001	0.005
99.9	0.25	0.01	0.02	0.02	0.008	0.005	0.005	0.005	0.001	0.005