Genuine Mitsubishi Crushable sump plug washer for Mitsubishi Airtrek 2.0 Turbo-R 4WD CU2W This is the best type of washer to seal the sump plug. Folded edge so it seals properly therefore it doesn't weep oil like cheap copper washers. It is only pence more expensive. Inner diameter = 14mm Outer diameter = 20mm Thickness = 2mm Mitsubishi Part Number MD050317
