Hoppe's 9 Universal Bore Guide .17 Caliber .416 Caliber. OpticsPlanet Inc is an Authorized US Distributor for Hoppe's 9 Cleaning Kits. For gun cleaning of any consequence cleaning rods are the only way to fly. Their bore guide also keeps solvents from dribbling into the action while cleaning. Specifications for Hoppe's 9 Universal Bore Guide: Manufacturer: Hoppe's 9 Fabric/Material: Aluminum Projectile Caliber: .17 Caliber Features of Hoppes Universal Bore Guide w/Three Interchangeable Tips: Three interchangeable chamber tips to fit .17 to .416 caliber Aluminum action collar fits .695"/.700" (17.65mm/17.78mm) diameter bolt actions of any action length Threaded brass pin locks the guide into the action in place of the bolt to allow proper cleaning from the breech Use with any cleaning rod size that is long enough for the barrel plus the Bore Guide (11 inches) Not recommended for use on Weatherby Mark 5 Sako Pika AR-15 and M-16 firearms Package Contents: Hoppe's 9 Hoppes Universal Bore Guide w/Three Interchangeable Tips This picture above is representative of the group of items. It may not match the exact item that you are looking at. Please make sure to read the description of the individual item. We offer complete line of Hoppe's 9 Cleaning Kits. For our complete selection of products by Hoppe's on sale please visit our Hoppe's page. For more Cleaning Kits please visit our Cleaning Kits store section. Hoppe's 9 Hoppes Universal Bore Guide w/Three Interchangeable Tips For Bolt Action Fi UBG