Exquisitely crafted for unsurpassed performance and durability, Da Vinci Maestro Kolinsky Brushes are made with male winter Siberian kolinsky red sable. The extra sharp needle-like point and longer tapered hair length result in faster action at the tip and the tightest snap at the point. - Da Vinci Maestro Kolinsky Brushes - Set of 4, Assorted, Short HandleMaestro Kolinsky Sets, 4 PC ASSRTD RND ST - Includes four brushes, one each of Series 10 Round 3, Series 11 Full Belly Round 3, Series 35 Long Tapered Round 3, and Series 5506 Restauro Retouch 3.