These Fish Paper rolls are easier to install with an adhesive backing that allows faster application. Good dielectric insulating properties as required in all Telecommunication Power Installations. Please note: Depending on stock availability color may vary from light grey to the higher priced very dark color as shown in the pictures (price will be matched). We ship the color available based on our stock availability. Prior to purchasing, if you require the dark color specifically please purchase that item specifically or contact us directly (email@example.com) for availability. These rolls are 5″ wide & 50′ long with the adhesive backing for even easier installation. The fish paper is 10/1000″ thick or 10mil thick. Our 4.5″ x 50ft has been phased out.