Ultra Patio Heater with stainless steel exterior. Solid stainless steel bolts. Life-time guarantee against rust on body, stainless steel panels, and base. This heater radiates a 20-foot circle of soft heat. Base accommodates a 20 lb tank (tank is not furnished with heater - available at well-known discount stores). Available for use with natural gas or LP propane. 40,000 BTU. Please specify if altitude is over 2000 ft. By Rankin-Delux. Please allow 2 weeks for delivery.