Hydrofarm Rockwool Block Cover 6" Pack of 40 lighting-&-electrical-components Less is more with this

Less is more with this highly concentrated formula that reduces the volume of nutrients needed to finish a crop

- Replacement parts included -1/4 gallon per minute spray

ChloroSorb SDS

PTFE (Polytetrafluoroethylene): PTFE gaskets

–Compact/Collapsible

Hydrofarm Rockwool Block Cover 6" Pack of 40 lighting-&-electrical-components Less is more with thisDescription Product Details: Block light from media Reflect light to plant leaves where it's needed most Eliminate algae and mildew growth 40 dual sided block covers per pack Specifications Barcodes: 10638104945797 (GTIN) 638104945790 (UPC A) Dimensions: 7. 4L x 7. 2W x 7. 5H (CS) 7. 0L x 6. 5W x 0. 2H (EA) Shipping Weight: 0. 33 lbs.