Sponge Semi-tacy Rubber Sheet Pimples-in with Special Ribbed Surface Treatment 55A/66B ITTF Approved Item: Tuttle 55A / 66B Type: Tacky Rubber Sponge: High density sponge 2 Hardness: 47 Approxi Features: Tuttle Fierce Animal desk tennis rubber sheet 55A / 66B It&;s manufactured from semi-tacky rubber sheet with patented ribbed surface treatment, which make the rubber sheet clean to drive loops Besides, the sponge is made of even air holes structure, of drastic inside energy 2 sponge make the rubber sheet of fierce strength If you are right-hand players, It&;s informed to use 55A as forehand rubber sheet and 66B as backhand rubber sheet you're left-hand players, It&;s instructed to use 66B as forehand rubber sheet and 66B as backhand rubber sheet 55ATuttle 66B Tuttle 2