Twin Wall - Clear 6mm - Polycarbonate Sheets Exhaust Shutter The 3-bladed aluminum prop is

The 3-bladed aluminum prop is balanced for smooth and quiet operation and features a corrosion-resistant coated steel hub

The creative design will allow you to grow a large number of greens

Our Sigma greenhouses are built to last

Upgrade Ready: Can be converted to a power shutter with a J&D motorized kit

Power Upgradable: Can be converted into a power shutter using a J&D motorized kit

Twin Wall - Clear 6mm - Polycarbonate Sheets Exhaust Shutter The 3-bladed aluminum prop isCoverLite 6mm twin wall multiwall polycarbonate sheet provides high light transmission, UV protection, and great impact strength. 6mm Double Wall Polycarbonate Panels Available in "Clear" or "Diffused" Size of each sheet is 4' x 8' (4 feet by 8 feet) Weight of each sheet is 3. 18kg 7lbs Thickness is 6mm UV protection 1UV Price per sheet: $65 10 Year Warranty