This is a heavy 16 ga. steel guard to prevent theft of air conditioners and heat pump outdoor units. The guard is adjustable to fit most units, including commercial units. Guard adjusts from 34 H x 30 W x 30 D up to 59 H x 51 W x 51 D. It is easily installed, with a pleasing appearance, removable for maintenance or service (use of key required). Additional security bars required for top and sides. One or two bars may be placed on top and/or side. Above illustration with two top and two side security bars in place.