For everyone who told us they wanted a louder, nastier train horn—here it is. Three tuned trumpets, 17.5 inches, 14.5 inches and 11.5 inches. High impact ABS. Flat-rack design requires 40% less clearance than our 500 Series train horns. Trumpets can be separated from the mounting brackets for installation in vehicles that could not otherwise fit full-size train horns. The 230 can be upgraded with the BlastMaster(TM) Upgrade Kit P/N 6880 to make it go even LOUDER!