
4mm Growell Walk -in Polycarbonate Greenhouses W6. 10-Year Warranty: Free 10-year guarantee on 4mm twin-wall UV-protected polycarbonate panels. Customizable Colors: Options include Mill Silver, Green Coated, and Anodized finishes. Durable Aluminum Frame: 1.2mm strong aluminum frame with gutter system and stainless steel bolts. Flexible Base Options: Choose between 150mm Galvanized Steel Base or 100mm Aluminum Base. Extended Length: Greenhouse length can be extended up to 10 meters to suit your needs. CE & ISO Certified: Accredited with ISO9001:2008 and CE certificate for quality assurance. Custom Sizes Welcome: We accept custom size requirements for your specific greenhouse projects. Easy DIY Assembly: Comes with detailed instruction manual for simple step-by-step assembly.