Plastic rimmed vessels for the 708-DS and 709-DS precisely align the vessel every time. Each vessel is individually turned on a lathe to precisely locate the vessel center.

Only plastic rimmed vessels have a collar incorporated onto the vessel around the ground glass groove, maintaining accurate centering and verticality alignment with the dissolution apparatus.

Dissolution Accessories Apex Vessels (previously known as PEAK vessels) are designed to prevent cone formation at the base of the vessel.
The Apex reduces the inherent inconsistencies in the hydrodynamics of standard hemispherical dissolution vessels.
An inverted apex is designed into the bottom of the vessel, displacing the unstirred zone and preventing cone formation.

Apex vessels may represent a better enabler to evaluate formulation options.