CYBER SAVINGS: NIOSH-Approved N99 Masks for less than 60 cents! Get them now!
These Stopper Retainers are required when standard funnels with glass, plastic or PTFE stoppers are used with 1-liter or smaller Separatory Funnel Holders (such as item# 21202-B) and the Glas-Col Bench Top, Mid-Range or 3D Floor Shaker. Available for 1 or 2-liter sizes.
The shaker and glassware shown here are not included. This items are sold individually.