25x25x1 Furnace Air Filters MERV 12 Pleated Plus Carbon 6 Pack Grow System/ Trays/ Reservoirs Long lasting

Long lasting

One is for turning the meter on/off and the other for automatic one or two point calibration

For smaller or less shaped lenses check out the Classic LED Clip-on

VIPARSPECTRA V165 Timer Control Series Aquarium LED Light is scientifically designed to maintain the balance of PAR output and coverage

25x25x1 Furnace Air Filters MERV 12 Pleated Plus Carbon 6 Pack Grow System/ Trays/ Reservoirs Long lastingNordic Pure 25x25x1 MERV 12 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer. This results in less flow restriction and 33% more surface area for cleaner smelling air. It will help eliminate unwanted odors as well as trap most airborne dust and particulate matter for fresh, clean air. Odorous gases and vapors (VOC) are attracted to and held by the activated carbon material