Product name:
Manual Greenhouse Winch

Features:
4:1 Gear ratio allows you to roll up greenhouse sidewalls effortlessly.
Allow you to control the ventilation and temperature of your greenhouse properly.
Designed to handle up to 295ft greenhouses, which can roll up a 100ft long greenhouse with very minimal effort.
Handle made from weather and rust resistant stainless steel.
Plastic resin casing provides superior longevity even in harsh environments.