A round catheter of 1 French has an external diameter of 1â3 mm, and therefore the diameter of a round catheter in millimetres can be determined by dividing the French size by 3: D (mm) = Fr / 3. or. Fr = D (mm) * 3. For example, if the French size is 9, the diameter is 3 mm. round catheter of 1 French has an external diameter of 1â3 mm, and therefore the diameter of a round catheter in millimetres can be determined by dividing the French size by 3: D (mm) = Fr / 3. or. Fr = D (mm) * 3. For example, if the French size is 9, the diameter is 3 mm.
In the FAQ on the PRS site it says: We set-up the guitars at our factory with the following string gauges: Most solidbody instruments are factory set-up with 10 - 46 gauge strings. The DGT is factory set up with 11 - 49 gauge strings with unwound 3rd.
Oh, yeah, I don't think that PRS makes 'em, but they very well may have their own specific specs for the core wire, wrap wire, and the gauges of both of those, that could very well be different from those usually used by the actual string-manufacturer contracted to PRS (probably one of the big ones).