Large enough to cover an entire 4 x 8′ plywood sheet, Bachmann SceneScapes 100 x 50′ Grass Mats roll out to instantly create a base for your layout′s landscaping. Mats are reusable and non-shedding, featuring a heavy paper backing making them great for train layouts dioramas and school or craft projects. SceneScapes Grass Mats are part of the line of Bachmann scenery products.WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov