Escoda Signature Collection Joseph Zbukvic Set 2 contains size 14 & 18 Aquario Mop Brushes. Escoda Aquario Squirrel Hair Brushes are made of top quality natural hair that comes from the tail of a squirrel which lives in the region of Kazan, in central European Russia. Squirrel hairs are the softest of all natural fine hairs and because of the hairs natural characteristics, they are the best in retaining liquid, making them the ideal tool for laying in washes on large area, wetting the paper or absorbing excess liquid. It is the perfect choice for watercolour painting.