Wondertone Solo Violin strings by Pirastro4/4 set. Specially modified synthetic core material for a focussed, direct and powerful sound. The silvery steel E string offers a brilliant, full and round sound up to the high registers. more focussed than Evah Pirazzi and Obligato strings, the Wondertone Solos require nearly no playing-in time. E1 silvery steel ball end, A2 aluminium wound, D3 & G4 silver wound.