Bore solvents can react to your cleaning jag as they remove copper fouling, but the Tipton Ultra Cleaning Jag's patented protective process shields it from bore solvents for a long life and improved cleaning.Technical Information: Tipton Ultra Cleaning Jag Set 13-Piece Material: Nickel plated brass Kit Includes: .17, .20, .22, .243/6mm, .25/6.5mm, .270/7mm, .30, .338/8mm, .35/9mm, .375, .40, .44 and .45 jags Plastic storage box with holes marked for each caliber jag