One set included EADG strings 

10 sets High Quality 4/4 3/4 1/2 1/4 1/8 Violin strings Set,Medium Tension

Diameter of each string:   E：0.25，A：0.51， D：0.68， G：0.88

 The E strings made of the steel.  

 The ADG strings  made of the aluminium magnesium alloy

They will improve the violin's sound better