K-Tip Natural Black #2 SolidK tip Natural Black #2 Solid is a single tone solid color professional hair extension featuring Level 2 (Darkest Brown). Designed for hot fusion application using flat keratin tipped strands, made from 100% human hair in 20", 22", 24", 28" at $280$440. For salon professionals only. What makes Natural Black #2 unique? Natural Black #2 delivers classic and universally flattering a single tone solid color that's consistent from root to tip with a