Schaefer Shutter Fans 360 Degree Spike 25 Shrubber 360 Degree Spike

25 Shrubber 360 Degree Spike adjustable flow

Tendrils attach to the support as the plant matures

In a general sense

These plastics/films are made from the toughest polyethylene resin in the business on a machine that stretches it out and makes it thin

Bearing: 3/4 inch Male NPT

Schaefer Shutter Fans 360 Degree Spike 25 Shrubber 360 Degree SpikeDescription Specs FAQs The Schaefer Shutters Fans are equipped with louvers to keep the heat where it belongs: in your greenhouse. If you're having trouble keeping the hot air in your greenhouse during cold months, then you need a shutter fan. Shutter intakes are placed on the opposite end of the greenhouse. They are motorized to prevent the wind from opening them when ventilation is not necessary. For added protection against greenhouse humidity,