Mixed Pack of 100 DIN 9021 Natural Coloured M3, M4, M5 and M6 Nylon Penny Washers Quantity and Dimensions: 25 x M3, Outside Diameter = 9.0mm, Inside Diameter = 3.2mm, Thickness = 0.8mm 25 x M4, Outside Diameter = 12.0mm, Inside Diameter = 4.3mm, Thickness = 1.0mm 25 x M5, Outside Diameter = 15.0mm, Inside Diameter = 5.3mm, Thickness = 1.2mm 25 x M6, Outside Diameter = 18.0mm, Inside Diameter = 6.4mm, Thickness = 1.6mm Manufactured from Nylon 66