" Available In: CBB-177 (.17 Cal) (Thread 5-40) CBB-022 (.22 Cal) (Thread 8-32) CBB-243 (.243 Cal) (Thread 8-32) CBB-025 (.25) (Thread 8-32) CBB-027 (.27) (Thread 8-32) CBB-077 (7MM) (Thread 8-32) CBB-030 (.30 Cal) (Thread 8-32) CBB-338 (.338 Cal) (Thread 8-32) CBB-12G (12GA) (Thread 5/16-26) Features Effectively remove dirt and grit from gun barrel Bronze bristles with brass core Will not harm or scratch barrel Durable and reusable Designed to withstand frequent use Superior cleaning ability "