72 Cell And Flat Tray Combo AIR FILTER BOXES A single calibration solution for

A single calibration solution for pH and conductivity makes calibration fast and ensures all of your measurements are accurate each time for better plant health and better yield

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so you'll never be without light

Secure the cloth using clips every 24-36 inches

72 Cell And Flat Tray Combo AIR FILTER BOXES A single calibration solution forAvailable in both 5 and 10 packs, we have combined the heavy duty 72 cell trays with our heavy duty 1020 trays for easy seed starting. Each 5 Pack contains (5) Heavy Duty 1020 trays and (5) 72 cell trays Each 10 Pack contains (10) Heavy Duty 1020 trays and (10) 72 cell trays