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. This Paper is the more popular dark color as shown in photo. 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.