1) Applicable to PCB, LCD, SMT, clean room 2) Sizes: 1", 2", 4", 6", 8", 10", 12" 3) Color: blue, and other ... steel sheet, film for dusting; Semiconductor etc for dusting.2) Sizes: 1", 2", 4", 6", 8", 10", 12"3) Color: blue, and ... .with use of comfortable,rotate smoothl sticky roller and sticky pad and pad holder