Magnetic Lock Metal Scrotum Pendant Ball Stretchers Testis Weight Stainless Steel Penis Cock Ring 5 Sizes for choice Material: 100% Real 304 Stainless Steel Inner Diameter: 34mm (1.34") For all 5 size rings Hight of Rings: 14mm( 0.55" ) for 225g Ring,  20mm ( 0.8" ) for 320g Ring 25mm ( 1.0" ) for 410g Ring 30mm ( 1.2" ) for 480g Ring 40mm ( 1.6" ) for 650g Ring 56mm ( 2.2" ) for 910g Ring Special advantages: 1, New Design of Magnetic Lock, Easy to wear on/off 2, All edges are desighed to Round edge, our rings will not hurt skin while wear it.  3, Mirror Polished and very smooth beauty surface. 4, 5 size for choice, Different training in different period. Please Contact us if any problem, we will try best to resolve it. Please don't open dispute arbitrary.