Tipton 13-Piece Best Rifle Bore Brush Set Bronze. Contained in a durable hinged box with marked cavities its easy to select the correct Bore Brush for your particular application. Because they are caliber specific you can be assured of an optimum fit to your firearms bore for efficient and thorough cleaning. .17-.45 calibers. All brushes have 8-32 threads (17 and 20 caliber have 5-40 threads and is a standard bore brush. Specifications for Tipton 13-Piece Best Rifle Bore Brush Set: Manufacturer: Tipton Fabric/Material: Bronze Color: Bronze Quantity: 1 Set Gun Type: Rifle Included Accessories: Durable Hinged Box 14 Brushes 17-45 caliber Projectile Caliber: .17 Caliber Threads per Inch: 8-32 Package Type: Box Features of Tipton 13-Piece Best Rifle Bore Brush Set: 13 piece caliber specific set of best bore brushes Contained in a durable hinged box with marked cavities Contains .17 - .45 caliber Jags have 8-32 threads .17 and .20 calibers have 5-40 threads Package Contents: Tipton 13-Piece Best Rifle Bore Brush Set Tipton 402173: 13-Piece Best Rifle Bore Brush Set Bronze