These highly resilient, pure gum, amber rubber stoppers have less free sulfur (max

• High resiliency
• Variety of stopper sizes
• One-hole design

Added hole facilitates laboratory usage. Stoppers sized as 00 or 0 have a 3mm hole diameter; size 1 stoppers have a 4mm hole. Rubber stoppers sized as 2 and larger have a 5mm diameter hole.

0.25%) and lower density than standard black rubber stoppers.