The Brause 513 produces fine hairlines, which makes it well suited for smaller writing. The Brause 313 is similar to the Gillott 303 calligraphy nib.
These are the pen holders that I recommend for the Brause 513.
Shipping costs NL&BE: €4.95 & Free shipping when you spend €50
Shipping costs DE: €6.95 & Free shipping when you spend €100.
(for orders under €10, shipping costs are €7.95 (BE €9.95))