A length of straight borosilicate Pyrex tube: 12 mm outside diameter, 2 mm wall thickness, cut to 50 cm. It is stock material rather than a finished item — the raw tube a lampworker, hobbyist or repairer starts from.
Specifications
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A length of straight borosilicate Pyrex tube: 12 mm outside diameter, 2 mm wall thickness, cut to 50 cm. It is stock material rather than a finished item — the raw tube a lampworker, hobbyist or repairer starts from.
Specifications
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Material: Borosilicate (Pyrex) glass
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Outside diameter: 12 mm
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Wall thickness: 2 mm
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Length: 50 cm
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Bore: 8 mm (12 mm outside diameter less two 2 mm walls)
Why the wall thickness matters
A 2 mm wall is heavy for 12 mm tube. It takes longer to bring up to working temperature than thin-wall stock and it is far more durable once formed — which is why this specification is the common one for pieces that get handled rather than displayed.
The other length
We also stock the same 12 mm x 2 mm specification in 30 cm. Take the 50 cm if you would rather cut down than run short.
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