DESCRIPTION Kits can be used to expand to all 2015 and newer Grandio greenhouse models. Roof window is included. see detail below Element This 4-foot extension will add 24 square feet to your favorite growing space 10mm Polycarbonate panel and 1 Roof window included. Ascent 4' Extension: this will add 32 square feet to your favorite growing space. 6mm Polycarbonate panel and 1 roof window included 8' Extension: this will add 64 square feet to your favorite growing space.6mm Polycarbonate panel and 2 roof window included Elite 4' Extension: this will add 32 square feet to your favorite growing space. 10mm Polycarbonate panel and 1 roof window included 8' Extension: this will add 64 square feet to your favorite growing space.10mm Polycarbonate panel and 2 roof window included Summit 4' Extension: this will add 32 square feet to your favorite growing space. 10mm Polycarbonate panel and 1 roof window included 8' Extension: this will add 64 square feet to your favorite growing space.10mm Polycarbonate panel and 2 roof window included
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