
Rubber bungs with a single pre-drilled hole for inserting tubing, probes, or glass rods.
Our Range Includes...
Small Size Rubber Stoppers: Sizes from No.5 to No.13 suitable for test tubes and narrow neck glassware.
Medium Size Rubber Stoppers: Sizes from No.15 to No.27 for standard laboratory flasks and bottles.
Large Size Rubber Stoppers: Sizes from No.29 to No.49 for wide neck vessels and demonstration apparatus.