UNITED SCIENTIFIC SUPPLIES Stopper: Rubber, 4 Stopper Size, 20 mm Bottom Dia, 26 mm Top Dia, 25 mm Overall Ht

This rubber stopper is used to seal laboratory flasks, test tubes, and other glassware. The 2 holes allow insertion of glass tubing, thermometers, or probes for gas transfer or pressure control. It is suitable for general chemistry, biology, and industrial lab applications.

This black rubber stopper has a Size 4 fit, 20 mm bottom diameter, 26 mm top diameter, and 25 mm overall height. It features 2 holes and is made of rubber. The manufacturer part number is RST4-H2 from UNITED SCIENTIFIC SUPPLIES INC.

3G Electric supplies UNITED SCIENTIFIC SUPPLIES rubber stoppers worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us to source the RST4-H2 stopper for your lab needs.

Select a stopper size that matches the flask neck opening. The Size 4 stopper has a 20 mm bottom diameter and 26 mm top diameter, fitting standard lab glassware. Ensure the stopper material (rubber) is compatible with your chemicals and temperature range. Measure the neck inner diameter before ordering.