Not a precision weather instrument our Brass Rain Gauges are simple tools for spot-checking rainfall in your own backyard. Measures up to 5" of rainwater in easy-to-read half-inch increments. Simply check daily, then empty the tube to be ready for next day's measurement. Also handy for monitoring sprinkler use. Gauge mounts on 24" steel stake, easy to place anywhere in lawn or garden. Brass has UV-protective coating. Steel stake will rust naturally over time.