Coco licious Silicone Kegel Trainer Black Balls. Now this is my kind of workout! Versatile Kegel training system with easy retrieval cord. 3 interchangeable weighted Kegel balls. Smooth and seamless premium Silicone. Safe and pure for body and pleasure made using phthalate free materials Silicone holder, balls, ABS plastic decor. 1 inch diameter, small balls: 20g and 30g e or approximately .70 and 1.05 ounces. 1.25 inches diameter, large ball: 40g e or approximately 1.41 ounces.