RubberPlug XL Set – #4 to #7 Lab-Grade Solid Stoppers (4pcs)

Seal it like a pro with the RubberPlug XL Set, featuring sizes #4 through #7. These solid rubber stoppers are perfect for larger bottle openings, glass labware, or DIY builds. Made from durable, lab-grade rubber, they offer a reliable airtight seal and resist heat, chemicals, and wear over time.

A must-have for home labs, tinkerers, or upcyclers needing larger-sized plugs that hold firm without slipping.

Product Details:
• Quantity – 4 rubber stoppers (1 of each size)
• Sizes – #4, #5, #6, #7
• Material – Solid black lab-grade rubber
• Features – Heat and chemical resistant, reusable
• Use – Ideal for sealing larger bottle necks, tubing, or lab flasks