The Beast -For everyone who told us they wanted a louder, nastier train horn, Here it is. Three tuned trumpets, 17-1/2 in, 14-1/2 in, 11-1/2 in. High impact ABS construction. 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 a BlastMaster Plus Upgrade Kit P/N 6885 to make it even LOUDER!