Variable Resistance Current Balance KST/EVR/1259 $00.00   Electric Field KST/EVR/1260 $00.00   Knife Switches KST/EVR/1261 $00.00 Knife Switch KST/EVR/1262 $00.00   Knife Switch KST/EVR/1263 $00.00   Resistance Coil KST/EVR/1264 $00.00 Thermocouple KST/EVR/1265 $00.00   Contact Key KST/EVR/1266 $00.00   Contact Key KST/EVR/1267 $00.00 [ Physics Lab ] [ Biology Lab ] [ Chemistry Lab ] [ Microscopes ] [ Lab Glassware ] [ General Labware ] [ Solar Models ]