The product is an 18.21mm thick steel spacer designed to fit Caterpillar heavy equipment. It is a genuine Caterpillar accessory, making it compatible with various Caterpillar equipment models. This high-quality spacer is essential for maintaining proper alignment and stability during operation, ensuring optimal performance and longevity of the equipment. Ideal for businesses and industrial settings where reliable heavy equipment parts are required, this CAT 1M-7643 steel spacer is a valuable addition to any maintenance or replacement parts inventory.