The main strings, or mains, are those that run vertically from the throat to the tip of the frame. The number of main strings is always listed first. The number 18 refers to the number of cross strings. The crosses, as they are often called, run horizontally across the racquet.

We would recommend beginners go with full bed nylon or a comfortable hybrid, intermediate players go with a hybrid, and advanced players go with either hybrid or full bed polyester. If you're interested in trying a hybrid string set-up, we'd recommend: Beginner: Wilson DUO Feel (Wilson NXT/Luxilon Element)

Thread the string through two holes at one end and then through two at the other end, so from the throat to the head. Once you've done that, hold the two ends together so you know it's even on either side. Put both strings into the tension head so you can place the clamp where it needs to do.