Red Rubber Stoppers Solid 13mm - Pack of 10 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.