Weight is a sign of quality when it comes to the Silca 210psi Replacement Gauge
According to Silca, their all-metal floor pump gauge is the only gauge featuring a FULL metal construction. Silca could have gone for lighter, cheaper components but instead added more metal by reinforcing some of the internals, to improve shock resistance.
The internal mechanism uses a diaphragm instead of a less expensive Bourdon tube, the needle is stabilized with a beautifully polished steel plate, and the gauge face itself was originally hand drawn by former Silca owner Claudio Sacchi's son, who is a cartoonist in Milan. This gauge has a notable heft to it, and will last many years provided you don't run it over with a car!