OptiBlock Parallel Synthesis Reaction Block Top Locking Plate, 28x70mm, 30mL Vial, Silver.• Seals Multiple Vessels Effectively • Wide Range of Vessel Sizes • Provides Syringe Access to all Vessels • Works at Boiling Point • Glove Box and Automation Friendly • Uses Existing Hot Plate Stirrers • Works with Aggressive SolventsThe OPTIBLOCK is a simple, easy to use tool for medicinal and process chemists. The block accepts up to eight different vial sizes and fits directly onto a hot plate stirrer having a 135mm top plate diameter.