Craftsman AC-0007 Compressor 4-Port Regulator. This regulator is used on compressor. Regulator fits model number 745903. 5-Inch long, 4-Inch wide, and 2-Inch high. Package weight of this item is 2-Pound. Craftsman - America's Most Trusted Tool Brand - is characterized by durability, innovation and consistency. From hand tools to power tools and from lawn & garden equipment to tool chests and other storage solutions, Craftsman products are built to last and designed to give you the confidence to complete any project no matter the size.