Pro-Shot 12 GA Cotton Bore Mop Pack of 12. Mop Shotgun Bore mop made with 100percent cotton and a brass core. They are made of the highest quality construction possible. Mops can be used for quick cleaning and bore lubrication. Mops are especially excellent when using oil for bore lubrication because they create foaming action that helps in the lubrication process. Standard American Shotgun #5/16-27 thread. Pack of 12. Specifications for Pro-Shot Cotton Shotgun Mop 10/12/16 Gauge: Manufacturer: Pro-Shot Length: 1 in Threads per Inch: 5/16x27 Included Accessories: Standard Caliber: 10 Gauge 12 Gauge 16 Gauge Fabric/Material: Brass Cotton Color: White Gun Model: Universal Package Contents: Pro-Shot Cotton Shotgun Mop 10/12/16 Gauge The Pro-Shot Cotton Shotgun Mop 10/12/16 Gauge MP12 is a quality addition to the Pro-Shot lineup. For more great deals on Gun Bore Mops by Pro-Shot please browse our Pro-Shot Gun Cleaning Kits page. What firearm models does the manufacturer say Pro-Shot Cotton Shotgun Mop 10/12/16 Gauge is compatible with? The manufacturer says that Pro-Shot Cotton Shotgun Mop 10/12/16 Gauge is compatible with UniversalPro-Shot MP12-CS: 12 GA Cotton Bore Mop Pack of 12