Red Rubber Stoppers - One Hole - 29 Pack of ten
Best quality Red Rubber. Shore hardness in range 46-55. Bottom diameter moulded on top face.
Holes 5mm diameter.
• Bottom diameter: 29mm
• Top diameter: 33mm
• Length: 32mm
• 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 29 stoppers are ideal to use with Pyrex HD NM Conical Flasks 500mL, Pyrex Flat/Round Bottom NN Flasks 250-500mL and Pyrex Conical WN Flasks 100mL.