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.
For example, the B3 Vibrato Kit is perfect for archtop hollowbody guitars like the ES-335. In this kit you'll receive the Bigsby tailpiece, screws, plastic washer, tension spring, alignment string and installation instructions.