Ultrasonic transit time Sensor Clamp-On, High Precision, Size D2H, paired, Portable with BNC adapter for steel pipe, Liquid, Pipe wall thickness from 11,2 - 15,7 mm (0.44 - 0.62 in), Temperature max. -40C - +121C/-40F - +250F Housing Polyetherimide/Alu non corrosion, incl. Couplant 7ME39600UC20 and sanding block for FST020, FST030 (FUS1010)