The styrofoam erlenmeyer flask rack is made to hold eleven 50 ml erlenmeyer flasks,with openings on two inch center-to-center.

The rack is made from dense styrofoam approximately two inches thick, 2 1/2 inches wide and 23 5/8 inches long.

Buna N O-rings are supplied to hold the flasks in the rack. The EFR-11 does NOT come with the erlenmeyer flasks. To insure a good fit

we must know the mouth and neck size of the erlenmeyer flask. Normal neck OD is around 23 mm, and height is around 77 mm.