Description: Tencor Surfscan 164 (Surfscan 164 Particle Counter) Tencor Surfscan 164 particle counter* Model 70-00260* S/n 0385-521* mfg 3/85* COntroller 70-00210 s/n 0385-721* 5" and 6" wafer, low profile carreir only* Parts tool