Our hand cranks are a simple and highly effective way to help ventilate your greenhouse.
• Self Locking; Automatic brake holds sidewall in place
Max roll length: 393ft(120m); Max roll height: 4.9ft(1.5m)
4:1 gear ratio for easy cranking
Mechanical brake holds sidewall in place
Our hand cranks are a simple and highly effective way to help ventilate your greenhouse.
• Self Locking; Automatic brake holds sidewall in place
Max roll length: 393ft(120m); Max roll height: 4.9ft(1.5m)
4:1 gear ratio for easy cranking
Mechanical brake holds sidewall in place
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