Excellent for use in severe corrosive conditions, this stand has no exposed metal parts - all surfaces are polypropylene. Base measuring 8.5" x 16" x 1-3/4" has smooth surfaces for easy cleaning and weighs 5-1/2 lbs. for stability. The 1/2" x 30" long rod screws into the base with a deep thread and sturdy tightening knob. Three rod positions for mounting at center or either end of the base. Autoclavable.