The Freightliner M2 106 And M2 112 Heavy Duty Washer Fluid Reservoir Cap is a practical and cost-effective solution for replacing a cracked or lost original cap. Designed to seamlessly fit certain vehicle years, makes, and models, this cap is a direct replacement that matches the dimensions of the reservoir cap perfectly. With a threaded attachment type and made from durable black and blue plastic, it offers a secure and reliable fit. This washer fluid reservoir cap is an excellent value, providing a quick and easy replacement option that is less expensive than going back to the dealership. It fits most Freightliner M2 106 and M2 112 models from 2004 to 2010 and is a direct OE replacement for Freightliner 22-58581-000.