... 4*4 cleanroom paper 1.SGS certification,report of product test 2.size:4*4,6*6,9*9,12*12 3.color:white 4*4 ... cleanroom paper:size:4*4,6*6,9 ... circuit plate and keeping it clean for electronic factory.3) With high water absorption, oil absorption and ... best product for dust and oil removing and wiping.4) With piece packing and rolling packing; available width ...