1) Applicable to PCB, stainless steel sheet, film for dusting; 2) Sizes: 1", 2", 4", 6",8", 10", 12" silicone roller Features:1) Applicable to breadboard, PCB, LCD, SMT, clean room, Semiconductor etc for dusting.2) Sizes: 1", 2", 4", 6", 8", 10", 12"3) Color: blue, and other colour.4) Stickiness: high, middle, low stickness available.5) Stable raw meterial, that attests to durability, no ageing, ...