The Gas Compression Tester by Lisle Tool Corporation with Part Number 20250 is a durable and reliable automotive hand tool designed for measuring gas compression. Manufactured in the United States, this tester has a length of 14.5 inches, a width of 4.75 inches, and a depth of 1 inch, making it easy to use and store. With a weight of 15 oz. this product is a valuable addition to any automotive tool collection, providing accurate results for vehicle maintenance and repair.