This little repair kit is an absolute lifesaver for anyone with inflatable items around the house! The set includes air stoppers (about 2 inches) and pullers (about 2.68 inches) that work perfectly for fixing yoga balls, exercise equipment, pool toys, air mattresses, and pretty much anything inflatable. I've used these to repair two different yoga balls and a pool float that would have otherwise been trash. The stoppers create a tight seal that actually holds air pressure - no more constantly reinflating your exercise ball every few days. The puller tool makes removing old or damaged plugs much easier without causing additional damage to the material. They're made from durable plastic that can handle the pressure of fully inflated exercise equipment. The white color blends in nicely with most inflatable items. Having this kit on hand has saved me from replacing expensive exercise equipment and summer toys multiple times. If you have kids with inflatable pool toys or use exercise balls regularly, this cheap little repair set is definitely worth keeping in your utility drawer. It's one of those simple tools that pays for itself the first time you use it to fix something that would have cost much more to replace!