
Rubber bungs with two pre-drilled holes for inserting multiple tubes, probes, or glass components.
Our Range Includes...
Medium Size Rubber Stoppers: Sizes from No.15 to No.23 for dual tubing or probe setups on standard glassware.
Large Size Rubber Stoppers: Sizes from No.25 to No.35 for wider neck vessels and teaching demonstrations.
Extra Large Rubber Stoppers: Sizes from No.37 to No.45 for complex assemblies and multi-connection experiments.