Achieve stronger orgasms with the Stella II Double Kegel Ball Set from Key. Stella II comes with a silicone double kegel ball holder that holds two of three interchangeable weighted silicone balls (30g, 40g, and 40g). For best results, begin with the lighter weighted balls (30g and 40g), insert and squeeze. As you feel your muscles strengthen, graduate to the higher weighted balls (40g and 40g). 1.5" x 6" / 3.75cm x 15.25 (overall). 1.5" / 3.75cm (each ball diameter). One set of weighted balls (30g, 40g and 40g). One dual ball holder with retrieval loop. Wrapped in body safe silicone.