Size Compatibility: the 14 mm (14#) inner diameter stopper fits perfectly with 14/20 outer joint lab glassware
Secure Design: features a threaded design for easy use and to prevent accidental disconnections
Durable Material: made from high-quality silicone, these stoppers are reusable; however, avoid cross-contamination by not using the same stopper for different substances
Backed by the manufacturer’s 1-year limited warranty