Specifications:
The exterior roughness comparator is used to check the smoothness of mechanical workpieces by comparison, while the visual inspection or microscope is used to compare and test the degree of exterior roughness.

features:
RUG-100: notebook sample block (turning, end milling, flat milling, exterior grinding, external grinding, polishing)
The notebook sample block contains standards for the six most important processing for methods among the popular "AA" values. All 30 samples were calibrated with for uAA (arithmetic mean) and metric equivalent um Ra.
Sample exterior roughness comparator 30 pieces of composite bag fixing gauges
3 Flat grinding: 2,4,8; 7/8 "x 3/8" each; Each type of exterior finish is a true and consistent reproduction, with a true idea of the feel, appearance and texture of machined parts
Compare conveniently and quickly; Comply with S.A.E and specifications
Overall wallet size (fully enclosed) L x W x H (inches): 6 x 3 x 3/8 * estimated *; Unit weight: 14 ounces * estimate only*

The package includes:
A set of 30 sample pieces