This Ultramax 12N5.5-4B is a 12v 5.5Ah motorcycle battery. Its dimensions are 138mm in length, 61mm in width, and 131mm in height. This battery is a direct replacement for models such as the Kawasaki Mach II, Malancia 1250B One, and Malancia Mark 125. The battery includes an acid pack and installation instructions, making it ready for use within 10 minutes.