Diversified's Extra Large Mobile Lab sits on four-inch locking swivel casters, so it's easy to move around your science lab. A 25-foot extension cord connects to a GFI-protected AC duplex outlet in the side of the cabinet. Locking drawers and cabinets let you store supplies safety. Select the mobile lab with the sink and combination mirror/markerboard so students see experiments from all angles. The stainless steel sink in the ChemGuard top has a hand water pump that attaches to the lower two-gallon water bottles.