The Difference between Butterfly Sriver, Sriver EL, and Sriver FXSriver and its variations have long been Butterfly’s bestselling rubber sheets. The original Sriver has a medium-hard sponge and offers great all-round performance. With the advent of speed-gluing, Sriver FX was introduced with a softer sponge that worked well with speed glue. More recently, many of Butterfly’s professional players expressed a desire for a Sriver product with the power of the original Sriver and the speed-gluing properties of Sriver FX. Thus, Sriver EL was born. All three Sriver products have the same top sheet; the difference is in the sponges. Products | 
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