Hanna 1413 uS-CM Calibration Solution -- 16 oz Perlite Propylene: <5ppm

Propylene: <5ppm

Reusable trellis netting with 6-inch squares for even spacing

These nutrients can help promote healthy growth and improve the overall health and vigor of plants

The 24-inch length of the Super Flex tubing ensures that water reaches a broad root zone

Passive-Cooled QB120 Board: No fan or moving parts

Hanna 1413 uS-CM Calibration Solution -- 16 oz Perlite Propylene: <5ppmTDS solution are produced with high quality potassium chloride in various concentrations. They are standardized using a conductivity meter calibrated with NIST potassium chloride. The 1413 ? S cm solution is the one best suited for general use. This solution is also available in combination kits with the pH 7 buffer for the easy calibration of multiparameter instruments.