Non-folding, removable side shelf support for Chemglass reactor support frames offers convenient support of distillation receiving flasks. Shelf features a V- shaped cut out area for easy viewing and installation of flasks with a bottom drain. Shelf attaches to the uprights of the support frame via PTFE coated aluminum mounting brackets. Units can be mounted on either side of the reactor frames. The shelves are constructed PTFE coated aluminum for chemical resistance. Flask support ring is PTFE.