Tipton Rifle Bore Brush 25 Caliber/6.5mm 8 x 32 Thread Nylon, 3pk These Nylon Bore Brushes clean while protecting the bore from abrasion. All brushes have 8 x 32 male threads except the 17 caliber which have 5 x 40 male threads. Features: - Fits: All .25 Calibers - Nylon Bristles (.291 Diameter) Unaffected by Ammonia based solvents. - Galvanized Plated Wire Core with Looped End and Crimped Coupler. - Thread: Standard 8-32" Notes: - Will Not Fit Outers Cleaning Rods