Set up a complete electrolysis demonstration within minutes! This rugged, economical electrolysis apparatus is easy to operate and perfect for student use-simply fill the tubes with an electrolyte solution, place them in a battery jar or 600-mL beaker, mount the tubes, insert the electrodes, and it's ready to go! Comes with stainless steel electrode pair, nonconducting support base, two test tubes, two rubber stoppers, and detailed instructions for use. Operates on a 9-V battery or DC power supply, not provided. Available with or without battery jar; replacement electrodes available.