Color: Silver; Material: Steel; Size: 20 x 16 x 2mm / 0.79 x 0.63 x 0.08 inch;30 x 25 x 2.4mm / 1.18 x 0.98 x 0.09 inch;50 x 44 x 2.9mm / 1.97 x 1.73 x 0.11 inch(OD*ID*T) Advantage: The clip ring is a buckle design, which is secure and can be firmly…