Roof Sheets Corrugated Profile Galvanized Roofing Sheet Shed Greenhouse Carport. Square U Bolts U Shape Bolt U Clamp Bolt Fastener M6 M8 M10 Stainless Steel. 16 - 35 °C！. The greenhouse window openers require no energy or electricity, making them practical and convenient, avoiding unnecessary heat loss and creating optimal conditions for plant growth！.
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