1,Microcrystal Glass Faceplate 2,High Quality Crystal Plate 3,Stainless Steel Suitable for factory, school, ... structure,Beautiful appearence: stainless steel seiko meticulous humanized design, high-grade durable, easy to clean,Durable: 430 durable stainless ... handle opening (or knob switch). The output power can be adjusted flexibly;Advance: advanced microcomputer control system, has no pot ...