Brand new replacement watch glass lens.
Glass surface: single convex (check the picture);
Watch glass thickness : about 1mm (not included the convex part).
Package included: 2x watch glasses.
available diameter size: 16,16.5,17,17.5,18,18.5,19,19.5,20,20.5,21,21.5,22,22.5,23,23.5,24,24.5,25,25.5,26,26.5,27,27.5,28,28.5,
29,29.5,30,30.5,31,31.5,32,32.5,33,33.5,34,34.5,35,35.5,36,36.5,37,37.5,38,38.5,39,39.5,40,41,41.5,42,
42.5,43,43.5,44,44.5,45mm.