Shimazumatsu thermostat CTO-10A, the equipment from the laboratory has not been tested for quality and does not include quality.The quality is as shown in the picture, with obvious signs of use.Interested friends can chat with me privately. The promotional products are not packaged for good or bad, and they are sold without refund or exchange. They are covered with shipping fees. If you need to contact me, you will ship the goods to you after taking the photo appropriately.