Gelsonlab Water filtration kit

The kit demonstrates how the water is purified by building a filtration system.
The kit includes:
       - 3 x 65 g gravel;
       - 3 x 65 g of sand;
       - 3 x 90 g activated charcoal;
       - 12 x 60 mm filter paper;
       - measuring cup 50 ml;
       - Safety glasses.

Dimensions: 20.5 x 15.5 x 6 cm.