The Music Stand Base Weight is designed to provide extra stability for MANHASSET® music stands. This is particularly useful in situations where an extremely large score of music is being used, or outdoor performances where the conditions are very windy. The base weighs 2 1/2 lbs (1.13kgs), is made of cast iron, and easily attaches to the MANHASSET® Symphony base for dependable performance. Supported by a 2 year warranty.