MONT 8′ × 8′ Black Greenhouse Heavy-Duty AluminumMONT Greenhouse 8 8 Made in USA MONT 8 8 Black Greenhouse Heavy Duty Aluminum 8mm Twin Wall Polycarbonate 10 Year Warranty The MONT 8 8 base model is the compact entry point into the MONT greenhouse system carrying the same U. S. grade extruded aluminum frame, 8mm twin wall polycarbonate panels, patent pending twist & lock door hardware, and 10 year industry leading warranty as every MONT in the lineup, in a 64 square foot footprint designed for