bannisters

/B AE1 N IH0 S T ER0 Z/
noun
  1. 1

    The handrail on the side of a staircase.

  2. 2

    One of the vertical supports of a handrail; a baluster.

Source: https://en.wiktionary.org/wiki/banister, https://en.wiktionary.org/wiki/bannister, https://en.wiktionary.org/wiki/bannisters