This rack is for chest freezers to store standard 96-Well and 384-Well Microtiter Plates. This rack is made of corrosion resistant stainless steel. Racks include stainless steel locking rods and handles. Security lock devices are also available for rack. This unit holds 25 plates with lids or 30 plates with out lids. This unit has 5 shelves for microtiter plates. Measures 16-9/16" length by 3-5/8" width by 5-1/2" height.