Alvin 748PM Metric Plastic Triangular Scales Customization Available Sodium bentonite is one of

Sodium bentonite is one of the "most effective low cost methods" of treating porous soils

and passes a 10+ foot drop test

and manufacturing industries who need to measure the diameter of circular objects with precision

It is produced by Spencer

The Deluxe Plot Center Stick can also be used as a hiking stick

Alvin 748PM Metric Plastic Triangular Scales Customization Available Sodium bentonite is one ofAlvin professional quality scales are made from high impact plastic with white, non reflecting matte faces and tapered edges. Hot stamped graduations Color coded furrows. Alvin 748PM Metric Plastic Triangular Scales includes hard plastic clear case. Graduations: 1: 20, 1: 25, 1: 33 1 3, 1: 50, 1: 75, 1: 100 Also Available 740PM Metric Architect Scale