Therapist's Choice Dual Action, 9" Air Pump for Exercise Balls, Pool Floats, Rody, Hippity Hop Bouncer, Hopper Balls Features: Economical pump for occasional use(It will take a 4 to 5 minutes of continuous pumping to fill a 65cm exercise ball) Pumps on the up and down strokes Length: 9" unextended NOTE: Does not include or support a needle nozzle (used on basketballs or exercise/balance cushions) Instruction: Most gymballs/space hoppers delivered with an inserted plug (air stopper) closing the pumping hole. Users need to take out that inserted white plug before using this hand pump to inflate. After inflation, remember to replace the plug back quickly to close the hole.