Released in 2014, and probably discontinued and removed from the ITTF rubber list, right? If you're serious, you should get permission to use it from the chief referee or tournament organizers at every competition. By the way, this Hi-End is a beloved partner that I've continued to use. For back-side pimple players, it's all about the thickness and color, isn't it? It's an original pimple rubber with a light green sponge, a pioneer in its field. As for its performance... figure it out yourself. I'll give you a hint for your search: "Giant Dragon BLAST". I apologize for listing a rubber that only seems to interest Red Clothes-san or the WRM cartoonist. Sorry m(__)m