Here's what Dingwall says about the Long Scale 5-String Bass Strings:
Our new Nickel Plated Steel long-scale strings are finally here. We’ve worked on these strings for almost a decade. They are custom wound specifically for our basses. The gauges and lengths have each been fine-tuned to give the ultimate in balanced feel, tone and long life.
Compared to our Long Scale Stainless strings the Nickels have a smoother tone and feel and a slightly higher tension on the E and B-strings.
These are the best strings available for your Dingwall Combustion, Afterburner series, Z-series or Prima Artist bass.