Allows to quickly evaluate the distribution in size diameter of a sample according to the 4 sizes,
Consists of a set of drawers with a bottom drilled to the diameter of the caliber to be spread.

2 models available:
                     -12mm, 12-14mm, 14-16mm, +16mm         or       -17mm, 17-20mm, 20-23mm, +23mm

Dimension 24x18x33cm
Quick and easy to use.