Each pair of nuts is made by hand! People think these balls are easy to make, but little does everybody realize, it actually takes hours to make one pair of silicone nuts. With high grade ecoflex-30 silicone we make solid awesome balls! Around 13" in length these secure to your thigh, hanging out the back of the trunk of your car (not serious do not do this, but if you do.. Pictures please.) and each pair is masterfully hand painted! Each pair of silicone nuts is truly a work of art!