Key™ by Jopen Mini Stella II is a unique double kegel ball set delivering twice the rewards. Designed in miniature for more comfortable, discreet use, this easily interchangeable set lets you swap weights to help strengthen pelvic muscles and enhance pleasure. Interchangeable set includes dual ball holder with retrieval loop, one 30g kegel ball, and two 40g kegel balls. Kegel balls are 1" dia. each. 4 3/4" long overall. Wrapped in premium body-safe silicone. This item is non-returnable.