STI-7511F-HTR SKU STI-7511F-HTR-2658 Heated Polycarbonate - Enc. Bkbx - Thumb Lock Please log in to see price or purchase this item Request an account Line Comment Special Price Features:Designed to maintain temperature above freezingExterior thumb lock and enclosed back boxHeater has three thermostatsRadiant heat plate prevents LCD displays from becoming sluggish or freezingMulti-voltage heater