This genuine McCormick 1964579C3 bulb is a 12V 10W replacement component designed for various agricultural and construction machinery. It is compatible with a wide range of Case IH, International Harvester, McCormick, and New Holland models, including tractors, combines, and other equipment. Measuring approximately 50.8 mm in length, 25.4 mm in width, and 25.4 mm in height, and weighing about 0.023 kg, this bulb ensures proper illumination and electrical function. It is an essential OEM part for maintaining original equipment specifications.