The Matterhorn Greenhouse is a high-quality, strong and attractive greenhouse ideally suited for garden centers, schools and growers in any North American climate. The Matterhorn greenhouse is constructed of heavy-duty 4-inch-square columns, and the trusses are constructed of all square steel. The Matterhorn greenhouse is available in 20-, 24- and 30-foot widths in increments of 12 feet. Lean-To styles are also available in 10-, 12- and 15-foot widths. Rimol Greenhouse Systems, Inc. (603) 629-9004.