1/4" x  1 3/4" top x 2 1/4"  bottom Foam Roadbed.  This auction is for 5 pieces 72" long (30' total), light gray in color.  This roadbed is a very dense foam, much firmer than the Woodland Scenics foam, and  has great sound deadning qualities, can be curved without sliting, easily cut with a sharp knife, and will not harden with age. A great substitute for Homasote or cork. It can be used for entire layouts.  This same material is also available in black, look for it in my other items. I accept only Paypal and ship USPS. I can custom cut widths in this material for different scales or yard mats. Please ask questions before you buy..I will send you a sample, just email me with your name and address thru the ask a question option.