Which of the following is not an equipment/facility used in badminton games?

Badminton uses racquets, not paddles. A racquet has strings stretched across a frame, while a paddle is solid without holes or strings.

Badminton players use racquets to hit shuttlecocks over a net. The racquet strings need regular replacement, which is why strings are also badminton equipment.

Paddles are used in table tennis, not badminton. All other options are actual badminton equipment, making paddles the incorrect item on this list.