Red Rubber Stoppers One Hole 33mm - Pack of 10

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

Holes 5mm diameter.

• Bottom diameter: 33mm

• Top diameter: 38.5mm

• Length: 39mm

• 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 33 stoppers are ideal to use with Economy NM Flasks 250mL, Pyrex HD NM Conical Flasks 1000mL, Pyrex Flat/Round Bottom NN Flasks 1000mL, Simax NM Flasks 250-500mL and Simax WM Flasks 250mL.