Hoppe's 9 Black Cleaner 6 oz. Hoppe's 9 Black Formula is powerful enough to remove carbon gun grime and grease from the most sensitive metals and plastics. Prepares metal surfaces to accept oil and lubricant; prevents rust when oil and lubricant are separated; improves bore life and reduces dry-wear; a premier metal cleaner rust preventative and corrosion inhibitor; provides rust and corrosion protection; and conditions and strengthens metal against rust and corrosion. Hoppe's 9 Black Formula is VOC compliant and ideal for use in automatic and semi-automatic firearms. Specifications for Hoppe's 9 Black Cleaner: Manufacturer: Hoppe's Black Color: Black Fabric/Material: Aluminum Quantity: 1 Container Volume: 6 oz Weight: 6 oz Size: 6 oz Package Contents: Hoppe's 9 Black Cleaner Hoppe's 9 HBC6: Black Cleaner 6 oz