Your basic LUNA bead system consists of a silicone composition girdle and four weighted beads. the weight of each bead is identified by its lucent colour Two pink 28gram beads one foundation bead with retractable leash and one crown bead Two powder blue 37 gram beads one foundation bead with retractable leash and one crown bead The LUNA Bead system is a combined pleasure exercise system for the circum vaginal and pelvic floor muscles. By marrying incremental resistance with movement inducing subtle kinetic vibe, LUNA beads facilitate more efficient and pleasurable Kegel-exercising.Insertable: 1 to 5 inchesDiameter: 1.25 InchesWidth: 4 InchesColour: PinkFlexibility: FirmFor Who: FemaleFeatures: InterchangableMisc: Free Satin BagMaterial: PlasticBrand: Lelo