About this item

• Precise Fit: available in I.D. 14 mm (#14), 19 mm (#19), and 24 mm (#24), designed to match standard laboratory glass joints 14/20, 19/22, 24/40, 24/29, ensures airtight sealing and secure connection
• Durable Rubber Material: made from laboratory-grade rubber that resists cracking and deformation, provides reliable performance over repeated use
• Reusable & Safe: can be reused multiple times, avoid cross-contamination by assigning dedicated stoppers to specific chemicals or experiments
• Accurate & Smooth Design: precisely molded with smooth surfaces and uniform dimensions for easy insertion and removal without damaging glassware
• Support & Replacement: backed by StonyLab’s customer service, any damaged items will be promptly replaced to ensure uninterrupted lab operations