The Mini-Discover units include the main frame and lower buffer chamber, 1 set of glass plates (1 notched and 1 square with .75 mm PVC spacers attached, 1 seal tubing, 2 combs (.75 mm Teflon 6 & 12 well), power supply leads and 4 clips. (Dual-sided model includes 2 glass plate sets, 4 combs, and 8 clips). Made to last, units are constructed of heavy- duty thick acrylic with pure platinum wire electrodes welded into the frame to minimize wire breakage, maintain even current, and ensure safety.