End Brushes on Mandrels - 3/8" Brush Length Excellent quality precision brushes. Clean and polish in hard-to-reach paces. 16-707 and 16-708 have 3/16"diameter and 3/32" mandrel diameter. 16-719/1 and 16-719 have 1/4" diameter and 3/32" mandrel diameter. Supplied in a package of a dozen or individually.