The Kolinsky (Mustela Siberica) is a species of the Mink family,
 a member of the Weasel clan and a native of Siberia and 
northeast China. There is no doubt Kolinsky is the best hair 
available for the manufacture of artists’ brushes due to being 
conical in shape, strong in character with a long tapered point
and thick belly. The excellent snap & spring together with 
immense liquid holding capacity make them a first choice for 
watercolourists. The high cost of the hair being the only major 
drawback (usually weight for weight three times the price of gold). 
Once used however the difference compared to others is well worth 
the difference in price. Consider Kolinsky Sable a long term 
investment. Personally as a brushmaker this is my absolute favourite 
hair to work with, indeed a privilege.