Other grades of Kolinsky red sable not considered the Finest or most select.
These brushes generally have a mixture of male and female kolinsky hairs. The
different sables are the best conic hairs available for artist brushes, and
differ only by degree of performance.
Squirrel (thin and delicate) has a fine point like sable and is unsurpassed in
color absorption. Softer and with less spring or snap than sable, squirrel
brushes are generally used very wet.