The Martin Marquis MA140S acoustic strings are made from tin-plated steel core wire that's wrapped with bronze wire. This light tension set also features a soft silk wrap on the ball ends to prevent wear on your guitar's bridge and end plate.
| Note | Gauge (in.) | Material |
| E/1st | .012 | Plain steel |
| B/2nd | .016 | Plain steel |
| G/3rd | .025 | 80/20 Bronze |
| D/4th | .032 | 80/20 Bronze |
| A/5th | .042 | 80/20 Bronze |
| E/6th | .054 | 80/20 Bronze |