The Ellis Ebonite Pratten is based upon the historic Pratten's Perfected - a design which is favored by many for the requirements of Irish traditional music due to its power and expressiveness. Ebonite is a natural non-synthetic hard rubber that is valued for both its stability and acoustic properties. If you are unfamiliar with ebonite, have a look at Geoffery's article on the subject here.
The Ellis Ebonite Pratten features nickel silver fitting and is available with or without a lined head joint.
Lined: a bit more shimmer/brilliance
Unlined: a bit more earthiness/woodsiness