purity 99.99% platinum wire electrode coated with ptfe three-electrode cell accessory insoluble anode -- 37mm x 0.5mm(diameter)

feature as follows: 1. platinum wire purity: 99.99%; platinum wire size: 37mm x 0.5mm(diameter). 2.the electrode is coated with pefe (polytetrafluoroethylene), and the size of ptfe is 40mm 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.