Surface Roughness Tester Drive Unit, Profile Ra, Ry, Rz, Rt, Rp, Rq, Rv, Rsk, Rku, Rc, RSm, S, RPc, R3z, Analysis Graph Bearing Area Curve, Amplitude Distribution Curve, Dimensions (In.) 6.85 W x 2.59 D x 2 H, Power Supply Ni-MH Battery, AC Adapter, Paper Type Thermal, Paper Width (In.) 2.28 in, For Use With Mfr. No. 178-563-01A, 178-563-02A, 173-573-01A, 178-573-02A