This fine grained non-metallic abrasive in an elastic binding agent is for dry cleaning or polishing copper laminates prior to printing or processing Eraser Block for cleaning and degreasing copper-clad boards Abrasive rubber block cleans and polishes. Size approximately 40 x 25 x 20mm Effective in cleaning metal contact areas on switches, relays, connectors etc. Fine grained non-metallic abrasive in an elastic binding agent is ideal for dry cleaning
