Red Rubber Stoppers: One Hole – 40mm – Pack of 10

Best quality red rubber.  Shore hardness in range 46-55.  Bottom diameter moulded on top face.  Resistant To Dilute Acid, Alkalis And Ammonia.

• Bottom Diameter: 40mm
• Top Diameter: 49.5mm
• Length: 40.5mm
• Temperature Range: -30°C – 70°C
• Hole Diameter: 5mm
• Pack of 10

Size 40 stoppers are ideal to use with Pyrex Heavy Wall Filter Flasks 1000mL.

Please note: Extreme care must be used when inserting glass into the holes in rubber stoppers.