Material: High quality 304 stainless steel<br />size:<br /><br />Total length: approximately 80mm / 3.2!#!amp!*!quot;<br />Maximum diameter: about 11.8mm /0.5!#!amp!*!quot;<br />Hole diameter: about 7.5mm / 3!#!amp!*!quot;<br />Ring diameter: about 27mm / 1!#!amp!*!quot;<br />Weight: 53 grams