Educational Lab Cork Ring, Holds 1000–3000ml Flasks, Size #3 by GSC International Inc.

Secure large round bottom flasks with the GSC Size #3 Cork Support Ring. Each ring measures 30mm tall with a 140mm outer diameter, featuring an inner hole of 90mm and outer hole of 120mm to stabilize flasks from 1000ml to 3000ml. Made from durable agglomerated cork, this support protects lab surfaces from scratches and heat while keeping glassware steady during experiments. Ideal for chemistry labs, STEM classrooms, and educational demonstrations, this single cork ring ensures consistent, safe, and organized laboratory setups.

Key Features

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