We Have ONLY ever stocked the original double sided Mylar made in the USA. This 200 micron (0.2mm), highly reflective product is far superior to other cheaper imitations that have been knocking about for years. Based on reflectivity tests that we carried out recently, this form of Mylar has by far the best reflective capability up against all other products used for this purpose. Available in three lengths - 7.5m (25'), 15m (50') and 30m (100'). Rolls are 135cm (4 1/2') wide.