Chiller Tube Cleaning System is the most common package used for cleaning 58" I.D. tubes of Trane, Blue Star, Thermax, Carrier, York and other units. Contents: PTC - 40 Tube Cleaner - 1 PFS - 500-79 Flexible Shafts - 2 N Nylon Brushes (specify size) - 25 PBT - 1, 2, 3 or 4 Buffing Tools - 2 (specify size) Replacement Blades for Buffing Tools - 8 Repair Kit for Flexible Shaft PFS - 500Consisting of:4 Drive End Couplings, 4 Tool End Couplings, 1 Shaft Repair Tool with Hammer, 1 Flexible Shaft Lubricator, 2 Bottles of Lubricant.