MONT BASIC 12FT. GREENHOUSEMONT Greenhouse 8 12 Made in USA MONT 8 12 Black Greenhouse Heavy Duty Aluminum 8mm Twin Wall Polycarbonate 10 Year Warranty The MONT 8 12 is the foundation a year round, heavy duty greenhouse built from U. S. grade extruded aluminum with 55+ lbs more material than typical imports, sealed with twin automatic roof vents, twin rain gutters, and patent pending twist & lock door hardware. Everything you need to grow seriously, without the accessories. Add