Mineral Watch Glass - For Clock & Barometer Convex Domed - Thickness 2.0mm - Ø 178mm to 238mm - 1 Pcs

Round convex domed watch and clock glass , 2.0mm thick, ideal for barometers and other applications. These convex shaped glasses feature an outward curved surface. Available in traditional imperial size with a tolerance of +/- 1/16th.

The lenses are approximately 2.0 mm thick (+/- 0.2 mm).

Tip: For barometer lenses requiring holes, use diamond drill bits. For maximum accuracy, use a steel caliper rather than a plastic one. Remember to add 0.1 mm if using a plastic caliper.