MCO Full Size Stacking, Leg, Caster, Vent and Base Kits Single Deck Kits: Leg Open Base Kit 1951213 Caster Open Base 1951214 Leg/Insert Kit 1951204 Leg/Caster Kit 1951205 Double Deck Kits: Caster Kit 1951209 Low Profile Caster Kit 1951210 Electric Leg Stacking Kit 1951221 Electric Caster Stacking Kit 1951225 Electric Low Profile Caster Stacking Kit 1951227 Gas Leg Stacking Kit 1951223 Gas Caster Stacking Kit 1951226 Gas Low Profile Caster Stacking Kit 1951228 Ventilation Kits: Direct Vent Kit 1951217 Canopy Diverter Kit 1951229