"STEM kits"

Soil Feeds Us And Sustains Us.

Monitors Hazardous Radon Levels

Illustrate the Chemical Variety in Soil

Sale

Perform qualitative soil tests without the use of chemical reagents and test tubes.

Rare Test for Economical Price

Accurate pH Testing

Safe, easy, economical test for three factors.

An Ideal Alternative to Liquid pH Indicators

Tests for Nine Essential Minor Elements

The individually packaged test factors in this outfit allow several groups to work simultaneously.