Heavy Duty Lab Stand 9" x 6-1/2" Enameled Metal Base Here's a great support stand for the lab. This very sturdy, very heavy (3.7 lb) microscope stand has a 9" x 6-1/2" enameled metal base bored to accept the 13-3/4" x 3/4" dia chrome rod that bolts to it. On the rod, an adjustable 9/32" thick x 1-5/16" dia ring tightens in place with a setscrew.