CVA's Barrel Blaster Quick-Clean Patches are specifically designed for keeping your muzzleloader in pristine condition. Compatible with all muzzle loaders between .45 to .54 caliber, the Barrel Blaster Quick-Clean Patches come pre-saturated with CVA's Barrel Blaster solvent - a citric-based compound that's water soluble and bio-degradable. Running these patches through the barrel dissolves the residue left over from the black powder and helps prevent rust.