PURE SUBSTRATES Max Air 4" Starter Block, Buffered + Superwashed Quantity:Case (300 pcs) So rest assured our quality

So rest assured our quality control is highly documented

The test strip colour should match the colour block between 35 and 40 seconds to indicate a PASS

That is why we shine the light so you can have the same keys during trimming

Clean up is easy and maintenance is simple

23 cm diameter 17

PURE SUBSTRATES Max Air 4" Starter Block, Buffered + Superwashed Quantity:Case (300 pcs) So rest assured our qualityPURE STARTER BLOCK WITH 40MM HOLE 10X10X7CM COMMERCIAL GRADE GROW BLOCKS MANUFACTURED FROM HIGH GRADE COCO RAW MATERIAL. PURE starter blocks are made especially for cannabis Organic product Produced in ISO 9001: 2015 factory consistent quality assured. Wetting agent ensures nutrients are immediately plant available pH buffered using our patented, sustainable and totally organic process. Less toxic for the environment and surrounding water sources. The