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