Asset Locker 300 Series 301 11.5″ Touch Screen, 16 Door, Control Unit, Built-in scale Option, See-through Door Details 304 14″ Touch Screen, 56 Door, Control Unit, Designed for Small Items, See-through Door Details 302 11.5″ Touch Screen, 16 Door, Add-on Unit, Built-in scale Option, See-through Door Details 305 14″ Touch Screen, 96 Door, Add-on Unit, Designed for Small Items, See-through Door Details 303 10.5″ Touch Screen, 21 Door, Control Unit, Built-in scale Option, See-through Door Details