Retort Stand Manufacturer, Supplier and Exporter for Chemistry Lab - Retort stands with aluminium support rods and cast iron bases. Base finished in silver-grey enamel to resist corrosion. A retort stand, also known as a clamp stand or ring stand, consists of a sturdy metal base and an upright rod, usually made of metal, that screws into the base. The rod acts as the primary support structure, to which various clamps and rings can be attached to hold different pieces of lab equipment in place.