Dwyer 160-KIT Pitot Tube Set of Standard Tubes includes 18?Ç¥, 24?Ç¥, 36?Ç¥, and 48?Ç¥ Dwyer Pitot tubes. These pitot tubes are constructed out of a durable stainless steel with etched insertion depth graduations and silver soldered connections to help prevent leaks. They feature a low sensitivity to misalignment up to 15 degrees, require no calibration due to their ASHRAE tip design, and are rated up to 1500??F (815.5??C).