REPLACEMENT FOR METROLOGICAL INSTRUMENT; COMPONENT: MAGNETIC BASE; ADDITIONAL DATA: WITH ARTICULATED ARM; MAGNETIC BASE 60X50X55 MM, FORCE ADVANCE 750N; DIAMETER HOLE 8 MM; ARTICULATED ARM WITH MECHANICAL KNOB, LONG: 200 MM; FOR QUADRANT COMPARATOR AND MILAN TAIL TO HOLD UNIVERSAL COMPARATORS; MARK 1: FISSO; N-PART 1: S-20.10; MODEL 1: S-20 F + M