Otis Technology AP Brushes 9 Pack Male 8-32 Thread Black/Blue/Bronze. Great for everyday use and can be used on a multitude of surfaces including wood. Double ends allow for large surface scrubbing on one end and precision cleaning with the smaller end. Specifications for Otis Technology AP Brushes: Manufacturer: Otis Technology Fabric/Material: Nylon Caliber: Universal Features of Otis Technology AP Brushes 2-Nylon All Purpose Brush 1-Blue Nylon All Purpose Brush The nylon brushes are the least aggressive meet Mil. Spec. and are safe for everyday use. The Blue Nylon Brush features stiff bristles that allow for a more aggressive clean. Package Contents: Otis Technology AP Brushes Otis Technology IP-316-9-BBN: AP Brushes 9 Pack Male 8-32 Thread Black/Blue/Bronze