Graham condensers, also called Inland Revenue condensers, feature an inner coil form for additional surface area, which results in highly efficient cooling. Graham condensers cool and condense a gas back into its liquid form. Designed for use in distillation applications, Graham condensers are typically constructed of borosilicate glass, making them more resistant to thermal shock than regular glass. Graham condensers generally contain a coiled condensing tube that is sealed into a water jacket with inlet and outlet tubes on opposite sites.