Otis Technology 12 Gauge Brushes - 50 Pack. With twice the fill of other brushes and bristles right to the end you get superior quality and precision cleaning every time.image Specifications for Otis Technology 12 Gauge Brushes: Manufacturer: Otis Technology Quantity: 50 Color: Bronze Fabric/Material: Bronze Caliber: 12 Gauge Threads per Inch: 8-32 Gun Type: Shotgun Features of Otis Technology 12 Gauge Brushes Otis gauge-specific brushes have the size indicated on the stem ensuring you grab the right brush every time. Package Contents: Otis Technology 12 Gauge Brushes Otis Technology IP-512-50: 12 Gauge Brushes - 50 Pack