silver edge january p0850(银色边1月P0850) silver edge february p0851(银色边2月P0851) silver edge march p0852(银色边3月P0852) silver edge april p0853(银色边4月P0853) silver edge may p0854(银色边5月P0854) silver edge june p0855(银色边6月P0855) silver edge july p0856(银色边7月P0856) silver edge august p0857(银色边8月P0857) silver edge september p0861(银色边9月P0861) silver edge october p0859(银色边10月P0859) silver edge november p0860(银色边11月P0860) silver edge december p0858(银色边12月P0858) golden edge january p0837(金色边1月P0837) golden edge february p2072(金色边2月P2072) golden edge march p0839(金色边3月P0839) golden edge april p0840(金色边4月P0840) golden edge may p0841(金色边5月P0841) golden edge june p0846(金色边6月P0846) golden edge july p0843(金色边7月P0843) golden edge august p0844(金色边8月P0844) golden edge september p0848(金色边9月P0848) golden edge october p2073(金色边10月P2073) golden edge november p0847(金色边11月P0847) golden edge december p2071(金色边12月P2071) rose golden edge january p1511(玫瑰金色边1月P1511) rose golden edge february p1510(玫瑰金色边2月P1510) rose golden edge march (light aqua blue) p1509(玫瑰金色边3月（浅湖蓝色）P1509) rose golden edge april p1515(玫瑰金色边4月P1515) rose golden edge may p1512(玫瑰金色边5月P1512) rose golden edge june p1508(玫瑰金色边6月P1508) rose golden edge july p1513(玫瑰金色边7月P1513) rose golden edge august p1507(玫瑰金色边8月P1507) rose golden edge september p1516 (dark lake blue)(玫瑰金色边9月P1516（深湖蓝色）) rose golden edge october p1514(玫瑰金色边10月P1514) rose golden edge november p1505(玫瑰金色边11月P1505) rose golden edge december p1506(玫瑰金色边12月P1506)

diameter 8.6mm(直径8.6mm)