Features: Adopts aviation connector, rustproof and anti-corrosion, with fine workmanship. Electrothermal film insulation surface can effectively protect mug cup from cracking. Easy installation, use with mug cup heat press machine. Suitable for mug DIY according to customized pictures. 6 kinds of mug capacity for option. Cylindrical: 8oz/ 11oz/ 20oz/ 30oz; tapered: 12oz/ 17oz. 2 kinds of voltage for option: 220V/ 110V. Widely used in advertising, gifts, promotional activities, etc. And it can also be used as a personalized item which is artistic and practical. Note: Mugs and heat press machines showed in the pictures are not included.