Presto 700 x 23c Long Valve Tube 60mm

[Enw.nigel]

I am looking to buy some of the above tubes as spares but without the thread that runs along the length of the stem. Does anybody know the name of the make of these?

 

[accountantpete]

Michelin Aircomp Ultra Light is one.

 

[Enw.nigel]

Michelin Aircomp Ultra Light is one.

Thanks accountantpete for the quick reply. That is exactly what I was looking for. Reasonably priced as well.