Size: 17mm to 21mm 
 Material: 316L Stainless steel,18k gold plated
Width : 6mm 
Quantity: 1 pcs 
100% Self_production 
m Thickness 2.0mm 
Size 7= Szie 17= Diameter 17mm ( Label size 17 ) 
Size 8= Szie 18= Diameter 18mm ( Label size 18 ) 
Size 9= Szie 19= Diameter 19mm ( Label size 19 ) 
Size 10= Szie 20= Diameter 20mm ( Label size 20 ) 
Size 111= Szie 21= Diameter 21mm ( Label size 21 )