These black rubber stoppers are made of solid natural rubber that stays pliable over a long period of time. Ideal for use with non-aggressive or concentrated solutions.
- Solid natural rubber
- Low sulfur content
- Each stopper has its size marked in raised figures
- Withstands temperatures -25°C to 70°C
- Dimensions: 20mm Top Dia. x 16mm Bottom Dia. x 25mm Length
- Hole Size: 4mm
- Sold in 1 lb. bags only, # of stoppers per bag is approximate