Greenhouse Sidewall Ventilation Crank Dr. Earth In this one

In this one

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Each seed starter component is stackable for easy storage

in every part of the yard and garden

and will stretch out to 7' when installed

Greenhouse Sidewall Ventilation Crank Dr. Earth In this oneVentilate your greenhouse with our side wall ventilation hand crank. Easily vent your roll up curtain sidewalls up to 150 feet long! Features Stainless steel handle, full plastic resin casing for long anti corrosion time The 4: 1 Gear ratio provides easy cranking Self Locking and automatic brake holds sidewall in place The drive shaft fits perfectly inside " EMT conduit. Attachment screws included " EMT conduit guide post not included but easily found