Clemco Spin-Blast Internal Pipe Blast Tool for blast cleaning the inside of pipe with an inside diameter of 8 Inch to 36 Inch. This part numbers includes two 10AT4 (1/4 Inch orifice x 1-3/4 Inch long straight bore) blast nozzles. Centering Carriage not IncludedSee Part Numbers and Schematics Guide for centering carriage options based on your pipe ID.