GSC International RS-6.5 Rubber Stoppers – Solid Lab Plug Size 6.5 – Non-Greasy Rubber – 1-Pound Bag (~20 Pieces) – Chemistry and Science Classroom Lab Use

These GSC International rubber stoppers are high-quality, solid (non-drilled) plugs designed for reliable sealing in science and chemistry laboratories. Each stopper is made from soft, non-greasy rubber with a durometer of 45, offering a snug fit without cracking or crumbling under pressure. Sized for common glassware, size 6.5 stoppers measure 34mm at the top, 27mm at the bottom, and 25mm in height. Each one-pound pack contains approximately 20 stoppers, making it ideal for classroom settings, lab kits, and bulk supply.

Lab-Grade Rubber: Made of soft, durable, non-greasy rubber with a durometer of 45 for reliable lab use

Size 6.5, Solid: No hole drilled; perfect for sealing flasks and test tubes in chemistry and science labs

Bulk Pack Convenience: One-pound pack includes approximately 20 rubber stoppers—great for schools and kits

Versatile Dimensions: Measures 34mm top diameter, 27mm bottom, and 25mm height for a variety of glassware

Not for Food Use: These stoppers are intended for educational and industrial applications only

⚠️ Proposition 65 Warning for California Residents:

WARNING: This product may expose you to chemicals including styrene and/or bisphenol A (BPA), which are known to the State of California to cause cancer, birth defects, or other reproductive harm.

For more information, visit www.P65Warnings.ca.gov.

 Choking Hazard Warning:

WARNING: Choking Hazard – Small parts. Not for children under 3 years

Latex Allergy Warning:

WARNING: This product contains natural rubber latex, which may cause allergic reactions in some individuals.

This item is not a toy. It is intended for use in educational, scientific, or professional settings only. Adult supervision is required at all times. Improper use may result in injury or damage. Always follow safety guidelines and wear appropriate protective equipment when handling.