Replacement wind cups, large with horizontal magnet, for anemometers 2003 and later. Outside cup diameter: 1.5" / 38.1 mm.
Large cups are the standard size shipped with the anemometer. These large cups are more sensitive to wind and breezes than small wind cups. If you live in an area where hurricanes and other high-wind storms may occur, you should consider using #07905S small wind cups.
For anemometers sold before 2003, see #07903L Wind Cups, Large (Anemometers 2002 and earlier).