The Wellness Kegel Training Kit delivers a fully customized strengthening routine. This complete set includes six balls, ogressively weighted in pairs from 0.6 ounces to 1.8 ounces. Light Purple Balls = 0.6 oz.; Medium Purple Balls = 1.3 oz.; Dark Purple Balls = 1.8 oz. The satin smooth silicone balls can be used alone or in pairs, for a total of nine possible weight combinations. Wellness Kegel Balls help strengthen your pelvic floor for better control and more intense pleasure. Make them part of a regular kegel exercise routine, or wear them to heighten arousal during foreplay. All Wellness Kegel Balls are made of platinum cured silicone that's body safe and easy to keep clean!