Hannabach 840 70cm Quintbass Classical Guitar Strings, Full Set

A: Hello Russell,
These strings are factory sealed so we did not measure them at this time but it is unlikely they will work for your application since the added length will increase tension; in all likelihood the tension increase will be too much for the strings.
For a situation like yours please contact us here-
stringsbymail.com/contact-us.html
Let us know what tuning you are using and if possible let us know what gauges you currently have installed on the instrument. We may be able to come up with a better option for you even if a special order is required.
Cheers!

A: Yes you can!
We don't normally stock those particular singles, but you can certainly special order them here: [Special Order Request]
(stringsbymail.com/special-order-item-request-soi-5458.html)