A Set of 50 Rubber Stopper With 1 Hole for Conical Flask.

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

Tapered stopper with a single hole in the center

Air-tight, flexible, and reusable
Features:

Chemically inert and non-reactive — suitable for laboratory use

Allows insertion of glass tubing, thermometer, or delivery tube while keeping the flask sealed

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