Product Overview Pair of replacement platinum electrodes for hoffman electrolysis apparatus. Reviews (2 reviews) Write a Review 2 Reviews Hide Reviews Show Reviews 5 Worked! Posted by Elizabeth Seibel-Hunt on Nov 3rd 2014 We needed the electrodes to use our Hoffman apparatus. worked great. 5 Good doing business with you Posted by Ben Hyde on Jan 13th 2014 There was a slight problem with my order but sci-supply contacted me promptly and worked out the problem.