1) Applicable to PCB, stainless steel sheet, film for dusting; 2) Sizes: 1", 2", 4", 6",8", 10", 12" 1,Clean rollercan quickly remove all ... etc., to improve the yield of electronic products.2,Features:1)high, medium and low viscosity2)non-toxic pollution-free ... rust; comfortable to use, the roller rotate freely.3,Applications: .PCB, stainless steel sheet, film for dusting; clean roller drain cleaning ...