Check the listing for details. New STIGA Vertical Table Tennis Rubber 20 Grain Height Black Medium 1710200117. Color: black, Condition: New. Listed at 39.20 USD. It is ideal for players who want stability in the front court and cut players who play tenaciously. ・Officially recognized: Japan Table Tennis Association (JTTA). ・Sponge thickness: 1.4~1.7mm (You cannot choose the thickness of the sponge).