pd4dUltrasonic Scaler tips, matches with DTE scalers, or satelec system. Similar to PD4D tip from DTE.The Pd4d bands extend from 1 to 8 eV in binding energy and the Au 5d bands from 1 to 10 eV below the Fermi level. When the ratio AuPd is 3 to 1 up to 1.5 to 1, the band is