GroStar GS2 Soil PH/Temp (2-IN-1) Pen Sper Scientific Direct Because the MASTER 4 uses

Because the MASTER 4 uses a relay to control your ballasts

Charge Time: 20 Minutes

Tilting light delivers illumination where you need it

(1) Buna-N Tri-Clamp Gaskets

Always use in combination with Athena Pro Grow or Pro Bloom

GroStar GS2 Soil PH/Temp (2-IN-1) Pen Sper Scientific Direct Because the MASTER 4 usesDescription Product Details: AI31020 GroStar GS2 Soil PH TEMP (2 IN 1) Pen Lab grade instruments designed specifically for growers! Includes: 2 year warranty (instrument) 1 year warranty Swiss made (probe) pH 7 and pH 4 solution (50ml bottles of each) KCL soaking solution (10ml bottle) Cleaning brush Hole dibber Lanyard and user manual Features: Measures pH and temperature in nutrient solution, soil, coco coir, rockwool, and many other media types