Ernie Ball's ukulele strings are crafted from 100% nylon monofilament. You can choose between traditional clear resin for a bright, well - balanced tone with great projection and black resin for a warm, rich tone with a percussive punch. These strings have ball end construction, making them easy to install and ensuring better tuning stability. Gauges: .028, .032, .040, .028

Using these Ernie Ball ukulele strings is a breeze. First, remove the old strings from your ukulele. Then, thread the new strings through the tuning pegs and tie them in a secure knot. Adjust the tuning pegs to get the right pitch. As for maintenance, keep your ukulele in a dry place to prevent the strings from rusting or getting damaged. Avoid excessive humidity. When not in use, you can cover your ukulele to protect the strings. If you notice the tone is not as good as before, it might be time to replace the strings.