12x25x 1/2 Half Inch Ring Panel MERV 10 Furnace Air Filters 6 Pack hawthorne The Hanna Instruments HI98107 pHep

The Hanna Instruments HI98107 pHep pH tester is a rugged and reliable pocket-sized tester for use in the lab or field

The SPH-1 comes complete with the SPH-1 hub

Electrodes can become dirty from use and will produce inaccurate results even as they read correctly in a pH buffer

This pruner has an ambidextrous design

it is an environmentally friendly by product

12x25x 1/2 Half Inch Ring Panel MERV 10 Furnace Air Filters 6 Pack hawthorne The Hanna Instruments HI98107 pHepNordic Pure Half Inch Ring Panel AC Furnace Air Filters consist of an internal frame bonded between flat layers of two different types of electrostatically charged HVAC furnace filter media. The first layer is a high capacity, polyester filter material which acts as a pre filter, capturing large airborne particles. The second, more efficient, layer is a MERV rated smooth poly blend filter material. The electrostatic charge works as a magnet to draw in