The product is a used Mitutoyo 20" rectangular steel inspection gage block, model number 611225-541. Made in Japan, this gage block is a precision tool used for metalworking inspection and measurement tasks. Its durable steel construction and accurate dimensions make it a reliable asset for CNC machining, metalworking, and manufacturing processes. Ideal for ensuring quality control in industrial settings, this gage block is a valuable addition to any workshop or factory.