Mini 180 degree tip balanced pitot tube allows flowbench technician to probe intake port and measure localized air velocity or air speed, and is less than .550″ wide to fit in to small places. Comes in 1/8″ diameter, has 8 static pressure hole equally spaced @ 0.020″ diameter, standard length of 10-1/2 inches long with black satin finish. (Requires second manometer or digital unit.) Please e-mail with any questions.