Also, each green is given a Stimp Meter reading to indicate the speed of the green.  Stimp Meter is a 36 inch stick with V-shaped grooves.  It will be raised to 20.5 degrees and a golf ball (1.62oz) is placed at the 30 inch mark and released down the grove.  A Stimp Meter of 8 means the ball travels 8 ft (96 in) after it leaves the Stimp Meter.