Description: Small size but powerful volume and tuned train horn sound Triple trumpet air train horn with glistening black finishing Great sound quality, extremely stable frequency,Long service life, reliable working performance Easy to install,The horn kit includes basic mounting hardware Fits for cars, trucks, SUVs, RVs,boats and all types of motorcycle Specification: Material: Iron Size Chart: Size: 420x260x106mm/16.54x10.24x4.17inch Package Includes: 1 Piece Horn 2 Pieces Bolt Nut Gasket Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture carefully before making payment. Please understand due to the difference between different monitors, the picture may not reflect the actual color of the item