Modell #151N Dan-kar's simplest and least expensive line of sequencers. Model #151N produces a gel running length (40cm) but is narrower (20cm) and can also be used to do SDS-PAGE.2O CM WIDE X 4O CM LONG GEL BUFFER CAPACITY: UPPER 400 ML, LOWER 400 MLTHIS UNITS COMES WITH SAFETY COVER & LEADS