Dwyer 160-18 Stainless Steel Pitot Tube 18 Inch is constructed out of durable stainless steel with etched insertion depth graduations and silver soldered connections to help prevent leaks. The Dwyer 160-18 features a low sensitivity to misalignment up to 15 degrees, requires no calibration due to ASHRAE tip design, and is rated up to 1500??F (815.5??C).