Short Hydroxy Purified Multi-Walled Carbon Nanotubes >95%,ID:2-5nm,OD:<8nm,Length:0.5-2μm,-OH:~5.6wt%，>95%,ID:2-5nm,OD:20-30nm,Length:0.5-2μm,-OH:1.8wt%，>95%,ID:5-15nm,OD:>50nm,Length:0.5-2μm,-OH:~0.7wt%
