- Hydroxy Double-Walled Crabon Nanotubes (DWNTs-OH),>60%, ID: 1-3nm, OD: 2-4nm, Length: 0.5-2μm, -OH: ~2.9wt%, 250mg
- Short Hydroxy Double-Walled Crabon Nanotubes,>60%, ID:1-3nm, OD:2-4nm, Length:0.5-2um, -COOH:~2.6wt%, 250mg