Combination: the kit included 10 air plugs, 1 remover, 1 adapter plug, suitable for most inflatable types Materials: the material of air plug is latex material, tough and durable, and the material of multi-purpose inflatable needle is PVC engineering plastic and metal air needle Multi-function: suitable for all kinds of balls, inflatable toys, inflatable sofas, yoga balls, swimming circles yoga ball, balloon, fitness ball, inflatable spring horse, balance trainer, Pilates ball, constant speed jump ball, horse yoga ball, air cushion bed, air pump accessories Portable: light and small, very convenient to carry, can fit in any backpack and ball bag with side pockets Easy to use: kids can also be easy to use the plastic tapered nozzle for inflatable toys and balloon, nice gift for boys and girlsALL GYM BALL SIZES: Valve Stem work in sizes 55cm, 65cm , 75cm and 85cm