Metal Back Draught Shutter 250Metal Back Draught Shutter 250 Use a back draft damper to seal your grow room when your fans are off. It is ideal for sealing your outlet, preventing bugs from entering and heat from escaping. This product is manufactured from high quality galvanized steel and features two spring loaded blades.

If ANY of the sensor detects a water leak

whether you’re a hobbyist or a commercial grower

Up to 7 amps per socket

For all of the above

1 pH tolerance

0 – 39 – 30 + 3MgO + 0

align-self:stretch}#html-body [data-pb-style=ESTY3M3]{display:flex

24x (Trays

During flowering/fruiting only

Used at 3ml per 10 litres

1”)  Weight 3

or with any medium/substrate of choice