A Set of 30 Rubber Stopper No. 13 for Conical Flask.

Product: A Set of 30 Rubber Stoppers — Size No. 13
Quantity: 30 stoppers per set
Size: Number 13 (designed to fit the neck of a conical flask)
Material: Durable, chemically resistant rubber
Design: Tapered to provide a tight, leak-proof seal
Features:

Chemically inert and resilient

Allows for a secure closure of flasks and test tubes

Suitable for use in laboratory, education, and industrial applications
Suitable for: Conical flasks, test tubes, bottles, and similar laboratory glassware