CVA Barrel Blaster Foaming Bore Cleaner 7 oz. Spray the foam into the barrel and allow to sit 20 minutes to one hour then swab foam out of the barrel and you are done Specifications for CVA Barrel Blaster Foaming Bore Cleaner: Manufacturer: CVA Volume: 7 oz Package Contents: CVA Barrel Blaster Foaming Bore Cleaner CVA AC1688: Barrel Blaster Foaming Bore Cleaner 7 oz