The Audio2000S AST439A dual heavy-duty speaker stands are members of the AST420Y-15 monitor speaker stand series that has been in the market place since 1995 with quality proof durability and reliability. The adjustable height of this speaker stand is from 33 3/4" to 49 1/2" with a heavy-duty locking pin fitting into any of five predrilled holes to secure desired height (height distance between two predrilled holes = 6 1/4 inches) The heavy-duty tubes utilize heavy-gauge virgin steel for maintaining repeatable quality. The tripod legs center brace is configured with heavy-duty steel for durability and long use. The length of the speaker stand legs is 27 inches. The tripod speaker stands collapse easily to fit inside the bag for easy transportation. Two speaker stand bags are included. The AST439A speaker stands are ideal heavy duty audio stands for loud speakers, studio monitors, PA systems, and more. The tripod legs are configured with non slip rubber feet for use on stage or in studio.