purity 99.99% platinum plate electrode coated with ptfe electrochemical insoluble anode (10mm x 10mm x 0.1mm)

feature as follows: 1. platinum plate purity: 99.99%; platinum plate size: 10mm x 10mm x 0.1mm. 2.the electrode is coated with pefe (polytetrafluoroethylene), and the size of ptfe is 80mm x 6.4mm(diameter). the terminal is gold-plated copper rod with size of 15mm x 2mm(diameter). 3. a black rubber ring is an accessary of the electrode, and the ring can adjust depth of electrode in electrolyte.