The purchase of a set of Ultrasonic Testing reference standards used for CFM56/F108 inspections: One (1) FBH Calibration Set (.060”-1.500”) (set of 8) P/N 4013316-417 One (1) DAC Reference Block (Annual System Certification per SPM 70-32-85 OR SPM 70-35-13) One (1) Standard (381 Kit) P/N SGP-044