Butterfly sriver rubber Table tennis ping pong bladeUp for sale is 1 (One) Butterfly Rubber Model name : Sriver (1. 3mm, 1. 5mm, 1. 7mm, 1. 9mm, 2. 1mm, Max) Black or Red Choose the specific model, color, as well as thickness!! The most successful Butterfly Rubber since it's introduction in 1967. More than 20 World and 70 European Champions have won their titles with Sriver. The combination of the hard and tacky rubber on the surface with a medium hard and flexible sponge makes Sriver the natural