Red Rubber Stoppers One Hole 17mm - Pack of 10

Best quality Red Rubber. Shore hardness in range 46-55. Bottom diameter moulded on top face.

Holes 5mm diameter.

• Bottom diameter: 17mm

• Top diameter: 20.5mm

• Length: 26mm

• Pack of 10

Please note: Extreme care must be used when inserting glass into the holes in rubber stoppers. The procedure should only be carried out by trained personnel. If in doubt consult your safety advisor.

Size 17 stoppers are ideal to use with the Pyrex NM Conical Flasks 50-100mL or Pyrex Flat/Round Bottom NN Flasks 100mL.