Gar M-108 Master Visual-Tactual Individual Block Conventional Machining Microfinish Comparator – M-108

Individual rectangular block (measuring 1 3/8″ x 1 7/8″). It is made of corrosion resistant electroformed nickel that is a duplicate of actual conventionally machined surfaces. This MICROFINISH COMPARATOR Surface Roughness Scale is a product of the engineering skill and precision workmanship of GAR Electroforming Division