... addition 5.RoHS Description: 100% Polyester Cleanroom Wipers Class 100Feature & Function:1, comprised of 100% Polyester double-Knitted, Soft texture;2 ... : Electronics industry, cleanroom, optical devices, optical fiber manufacture, printing, SMT, precision equipment, food and pharmaceutical, mechanical processing, ... 228mm) 150PCS/BOX 1012 12"×12" (304mmX304mm) Class 100 Polyester Cleanroom Wipers