A Set of 50 Rubber Stopper 1 Hole for Boiling Tube.

Product: A Set of 50 Rubber Stoppers with 1 Hole — Designed for Boiling Tubes
Quantity: 50 stoppers per set
Material: Durable, chemically resistant rubber
Design:

Tapered stopper with a single hole in the center

Hole allows for insertion of glass tubing, thermometer, or delivery tube
Features:

Chemically inert and non-reactive — suitable for laboratory use

Air-tight fit to effectively seal boiling tubes while allowing apparatus to pass through

Durable, reusable, and flexible
Suitable for: Chemistry labs, education, industrial applications, and scientific experiments