... ,Copper purity over 99.5% Copper wool used in motor filter,oil and gas separator, dust, environmental protection, engine silencers, mechanical ... wire dia. 0.08-0.3mmHole dia. : 2mmx3mm,4mm x 3mm,12mm x 6mmWidth: 40mm,80mm, 100mm,150mm,200mm 300mm,400mm,500mm ... 10 years experience to make the copper wool. Copper wool filter