Red Rubber Stoppers - Solid - 13 Pack of ten
Best quality Red Rubber. Shore hardness in range 46-55. Bottom diameter moulded on top face.
• Bottom diameter: 13mm
• Top diameter: 16mm
• Length: 24mm
• Pack of 10
Size 13 stoppers are ideal to use with the Pyrex HD NM Conical Flask 50mL or 18mm diameter test tubes.