Specified by many state highway departments, these easily transportable (162 lbs.) curing boxes provide a portable, controlled environment for curing concrete test cylinders. Both models store up to (22) 6” x 12” cylinders in a durable, insulated plastic container with removable 14 gauge galvanized steel rack that holds samples from the bottom to provide optimum water circulation and even curing. Stainless steel hinged lid features sealing gasket and tough steel, lockable buckles. Has convenient bottom drain valve. 110V and 220V models available. 21” High x 25” Width x 75” Length. The economy curing box is a heat-only unit and comes with an adjustable preset temperature control that automatically cycles to maintain curing temperature. Comes with 3” dial thermometer for reading bath temperature. The Heat/Cool curing box comes equipped with a maintenance free heat pump that maintains bath temperature at 72°F (+/-2°F between -10 and 100°F ambient). Comes with digital temperature readout and heat/cool indicator lights. Exceeds ASTM C-31, C-192, C-511. AASHTO M-201, T-23, T-126