Various option availableTypeSeriesActionBore size (in)StandardNCQ8Double acting single/double rod9/16", 3/4", 1-1/16", 1-1/2", 2", 2-1/2", 3", 4"StandardNCQ8Single acting single rod9/16", 3/4", 1-1/16", 1-1/2", 2", 2-1/2"Super compactNCDQ8xZDouble acting double rod9/16", 3/4", 1-1/16", 1-1/2", 2", 2-1/2", 3", 4"Super compactNCDQ8xZSingle acting single rod9/16", 3/4", 1-1/16", 1-1/2", 2", 2-1/2"