Cilas 1064   description   fineness   D 50 ca. µm  NDF 120 semi-degrading fine 12 NDF 150 semi-degrading fine-medium 15 NDF 170 non-degrading medium 18 NDF 200 semi-degrading medium-coarse 20 NDF 3120 non-degrading, very bright with excellent travel and flop fine 12 NDF 3150 semi-degrading, very bright with excellent travel and flop fine-medium 15 NDF 3200 semi-degrading, very bright with excellent travel and flop medium-coarse 20