BKYOGA BlackKey Exercise Gym Yoga Ball Replacement Plugs, Air Stopper Plug Pin Remover Puller, White Material: Plastic; Color: White Replacement air plug adapter kit for gymball Plug length: Approx. 5.2cm; Remover length: Approx. 6.5cm Suitable for most gym ball sizes: 55cm, 65cm , 75cm, 85cm Package includes: 5pcs air stopper plugs and 1pc plug puller