touch screen Dust-proof type,with metal-frame size from ... flat LCD,4mm clear glass,transducer bevel mounted,water-proof type. Technology: Surface Acoustic WaveSize: 19inch, 4: ... from 7"-47"are available)Feature: Anti-dust, (anti-glare,anti-dust,vandal-proof and standard are available)Frame: Metal ... , Kerosene, Vinegar.Accessory: double glue tapedust-proof tapeAgency Approval: UL, CE, FCC, RoHS, CB