DURABLE YO-YO STRING: This cotton string is compatible with Duncan metal and plastic yo-yos. The durable string does not hurt the fingers, ensures yo-yo performance does not suffer, whether you are a beginner or a seasoned yo-yoer.
REPLACEMENT STRING: This is the perfect replacement string for Duncan series of plastic and metal yo-yos. Easy to replace, this 5-pack of replacement cotton string is essential for yo-yo enthusiasts who often wear-out the string due to repeated usage.
100% COTTON STRINGS: There are many types of yo-yo strings but the 100% cotton strings are considered the softest and have impressive resistance to wear & tear. Cotton strings like these are least likely to burn or scrape-against the skin.