Dwyer 160-48 Stainless Steel Pitot Tube 48 Inch for Air Flow is made out of tough and durable stainless steel and is etched with insertion depth graduations in addition to silver soldered connections to help prevent leaks. The Dwyer 160-48 features a low sensitivity to misalignment up to 15 degrees, is rated up to 1500°F (815.5°C), and requires no calibration because of its ASHRAE tip design.