寬緊帶 [宽紧带]

Jyutping fun1 gan2 daai3
Pinyin kuān jǐn dài

Definitions (Wiktionary)
  1. noun, Wu
    elastic cord; elastic braid
    (syn.) 牛筋带, 牛筋帶, 树奶带, 鬆緊帶, 松紧带, 樹奶帶, 掬带, 掬帶, 猴皮筋兒