Manual Film Roller
For film greenhouse ventilation, manual film roller is good choice for its convenience and economy. Both side and roof type is optional.

Side Ventilation
Roof Ventilation System

Type	Function	Max Roll Length	Max Roll Height	Max Torque	Type
461-1	Side Open	50m	2.0m	35N.m	Manual
461-2	Roof Open	50m	1.8m	30N.m	Manual