Tanis 00333 Red Sable Marking Brush, #3 Size, 7/64" Diameter x 7/16" Trim, 7-1/2" Overall Length (Pack of 12) Red sable marking artist brush 7/16-inch trim length Measures 7/64" diameter by 7-1/2" length Red sable is a reddish-brown color made from weasel hair Less resilient to solvent and chemicals used in oils