Key by Jopen Stella II Robin Egg Blue Double Kegel Ball Set. Achieve stronger orgasms with the Stella II Double Kegel Ball Set from Key Pleasure Toys. One set of weighted balls: 30g, 40g and 40g. For the best results begin with the lighter weighted balls. 30g and 40g. Insert and squeeze. As you feel your muscles strengthen, graduate the the higher weighted balls 40g and 40g. The Key is in your hands. Key welcomes you to a world of greater pleasure toys that feel more effortless, natural and arousing than ever before.Created by women and couples these innovative range of high quality are meticulously crafted toys to excite and delight you in every way. This means with every moment with Key is an inviting and stimulating experience. In other words mind blowing make you want to wake your neighbors up good time. Double Kegel ball set. One dual ball holder with retrieval loop. Wrapped in body safe silicone. 1.5 inches by 6 inches overall. 1.5 inches each ball diameter. Let's work it out! Great to use in conjunction with Kegel exercise routines. Soft luxury lint free bag included. Directions included. Always wash before and after use. Materials: Silicone balls, holder, ABS plastic decoration.