Six stainless steel quartsized tanks (vats), in black copolymer housing for minimum heat radiation and maximum thermal insulation. Designed to optimally heat optical lens tinting solutions and other similar materials. The standard six quart unit can hold up to 12 mini vats (optional). The system incorporates one 1500 Watt stainless steel heating element, designed specifically for heating OptiSafe Heat Transfer Fluid without burning it. This is a common problem in many heating units. The system is also supplied complete with vats, lids and starter kit for professional lens tinting.