Ideal for corrosion studies, this 12 mm OD rotating cylinder electrode tip uses 12 mm OD RCE cylinder inserts (sold separately), fabricated from just about any metal of interest. Standard cylinder inserts offered by Pine Research include several varieties of steel; however, cylinders may be made from other materials upon request. Alternately, cylinder inserts with the appropriate dimensions may be fabricated by the customer. A mounting tool (sold separately) is required to change the cylinder.