The Hedland H671a-100 Flowmeter is a mechanical flowmeter designed for measuring air and compressed gas flow rates. It is made of durable aluminum housing material with a Viton seal for reliability. This flowmeter has an accuracy of +/-2% of full scale and can handle a maximum temperature of 240 degrees Fahrenheit. With a maximum pressure rating of 1000 psi, this flowmeter is suitable for various industrial applications. The product is compact in size, with dimensions of 2-3/8 inches in height, 3.100 inches in width, and 6-5/8 inches in length.