The Authentic Original All-New Purple & Yellow Tiger Washboard is made of 24 gauge stainless steel and is for the Professional Washboard player. Much time and effort are spent on hand smoothing and polishing all edges. What a great gift for someone who has everything these are one of a kind. 31 Hand bent ribs for that one-of-a-kind Key of Z Rubboard resonate sound! Playing area 19 inches Long X 13 1/4 Inches Wide. The Key of Z Purple & Yellow Tiger Rubboard is a great choice for beginners and also for professional players as well. My Rubboards are finished the old-fashioned way the way we have been doing it since 1946 by rubbing the edges with a finishing stone. Then I buff out the edges with scuffing pads for a nice clean smooth edge.