FEINPRUF Millipneu Surface-finish Comparison Gauge Models: 1020, 1040, 1060, 1022, 1024, 1062 and 1064. Operator's Instructions. FEINPRUF Millipneu Surface-finish Comparison Gauge Models: 1020, 1040, 1060, 1022, 1024, 1062 and 1064. Operator's Instructions. Models: 1020 1024 1040 1062 Contents: Operators Manual Other