E string is made of stainless steel
A, D and G strings have nylon core wounded with  Aluminium/Magnesium alloy

The four strings are individually wrapped.  

 If for whatever the reason you are not happy with your purchase, you will get a FULL refund. 

Postage and Delivery: The buyer will pay £1 for delivery and the postage is free for the additional ones.  The item will be posted to you the same day by Royal Mail First Class Post when your payment is received before 13:00 O'clock. Otherwise, it will be posted the next day. Please note that all payment received over the weekend will be posted the following Monday. International Buyers please see postage details.