A Thickness of 1.5cm a diameter is 0.51cm and a nice weight of 275gms the 51mm Sextreme Magnetic Ball Stretcher is a testicle ring and testicle weight all in one! It's weighty and can be put on and taken off much easier than the rings with a screw and key: the magnetic piece makes this possible. Please note: the magnets are very strong, make sure that no skin gets caught between the magnets! The testicle ring can delay ejaculation, as well as providing a pleasant stretching effect, thanks to the weight of the ring. Made of Stainless steel. Also available in 39mm & 45mm.