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 - Silicone (holder. balls) ABS (dcor) Size 6 x 1.25/15.25cm x 3.25cm (overall) 1/2.5cm (diameter. small balls: 20g and 30g) 1.25/3.25cm (diameter. large ball: 40g)