F6SB Small Razertip Calligraphy Chisel Pen - standard
HD6LC Large Razertip Flat Chisel Shading Pen - heavy duty.
HD6MC Medium Razertip Flat Chisel Shading Pen - heavy duty.
HD6SC Small Razertip Flat Chisel Shading Pen - heavy duty.
T6SB Small Razertip Calligraphy Chisel Tip - standard
TH6LC Large Razertip Chisel Shading Tip - heavy duty.
TH6MC Medium Razertip Chisel Shading Tip - heavy duty.
TH6S Small Razertip Chisel Tip - heavy duty.
TH6SB Small Razertip Calligraphy Chisel Tip - heavy duty.
TH6SC Small Razertip Chisel Shading Tip - heavy duty.