Body Sport FusionBall 7.5-10" Mini Fitness Ball - Use for pilates. Inflates with included straw. Ideal for isometrics, Core work. No pump necessary! 7.5 - 10" mini fitness ball NO EXTRA COST TO BUY NEEDLE AND PUMP NEEDED this ball inflates with included straw Ideal for isometrics, abdominal work and many other exercises Used under the head, neck, and feet Perfect compliment to MSD fitness mats