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Do not touch when light working
Backdraft damper at outlet: Included
while promoting thicker
Requires certified HVAC professional installation
it's great for commercial or home use
Non-Woven Poly 6 Mil - Blackout - 32' x 100' organic Do not touch when lightThe Blackout Greenhouse poly ensures no light will reach your plants until you want it to! Blackout Poly is the ideal covering for light deprivation greenhouse setups and is black on one side with a reflective white outer layer to further prevent light penetration. Using blackout poly on your greenhouse is found to result in improved production and increased plant yield that comes from growing year round regardless of weather conditions, and it is
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