Bluelab PPM Conductivity Pen Containers + Support The motor box detaches from

The motor box detaches from the mounted frame for tool-free cleaning

The wrapper is what separates a 300-count case from loose bulk

Easy to install and compatible with peel and stick zippers for creating sealed doorways

A square pack cants across the diameter and gets in the way of the cone

or once plants stop growing vertically

Bluelab PPM Conductivity Pen Containers + Support The motor box detaches fromBluelab PPM (Parts Per Million) Pen Testing Meter for Hydroponics and Solution Measuring Bluelab PPM Pen is the latest innovation for hand held conductivity meters and the ultimate handy solution for measuring conductivity. Hydroponic growing lets you give the best care possible to your plants. The quality of care is in your control. The Bluelab ppm Pen provides a compact, quick and handy way to manage the success of your crops to ensure they have the