Physics - Electricity - Inductance & Variable Resistance Many thanks for checking out our website. Below are a list of our on-line products.   Gassler Tube KST/EI/1186   Demonstration Transformer KST/EI/1187   Phosphorescent Mercury Tube KST/EI/1188 Rectilinear Propagation KST/EI/1189   Thermocouple KST/EI/1190   Tangent Galvanometer KST/EI/1250 Tangent Galvanometer KST/EI/1251   Wheatstone Bridge KST/EI/1252   Potentiometer KST/EI/1253