Copypasta from tennisonly.com.au
Providing you with the perfect opportunity to try three of the premium strings on the market at a great price, the Luxilon Trial Pack includes Alu Power, Element, and 4G. Used by many touring pro's, these Luxilon strings all come in 1.25mm gauge and will give you the opportunity to perhaps find your new favourite string or simply try something different.
Strings included:
Luxilon Alu Power 1.25/16L String Set
Luxilon 4G 1.25/16L String Set
Luxilon Element 1.25/16L String Set
Are these made out of cat guts or are they synthetic ?