Size #3 Cork Support, 30mm Tall × 140mm OD, 10-Pack for 1000–3000ml Flasks by GSC International Inc.

Keep large round bottom flasks stable with this pack of 10 Size #3 Cork Support Rings. Each ring measures 30mm tall with a 140mm outer diameter and features an inner hole of 90mm and outer hole of 120mm, accommodating flasks from 1000ml to 3000ml. Crafted from durable agglomerated cork, these supports protect lab tables from scratches and heat while ensuring glassware stays upright during experiments. Perfect for chemistry labs, STEM classrooms, and educational demonstrations, this 10-pack delivers reliable, organized, and safe flask support for all laboratory setups.

Key Features

• Pack of 10 cork support rings, size #3
• 30mm tall × 140mm outer diameter
• Inner hole: 90mm; outer hole: 120mm
• Made from agglomerated cork
• Fits 1000–3000ml round bottom flasks