Clean Out Balls | Rubbermill Note: Ball must be larger than interior pipe diameter for proper cleaning. All sizes available in soft, medium, and hard styles. Frequently referred to as Concrete Pump Clean Out Balls, Clean-Out Balls, Cleanout Balls, Wiper Balls, Cleaning Balls, and Blow-Out Balls used to clean all types of . Ball Mill - scribd Scribd is the world's largest social reading and publishing site. Bonney Forge® All dimensions are in inches, all weights are in pounds. Contact Mt. Union directly for additional size ranges.    Read More