These highly resilient, pure gum, off-white rubber stoppers have less free sulfur (max

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

Made with two holes to facilitate laboratory usage. Stoppers sized as 00 or 0 have 3mm diameter holes; size 1 stoppers have 4mm holes. Rubber stoppers sized as 2 and larger have 5mm diameter holes. Length: 25mm.

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