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.
An archtop guitar is a steel-stringed acoustic or semi-acoustic guitar with a full body and a distinctive arched top, whose sound is particularly popular with jazz players.Typically, an archtop guitar has: 1  6 strings. 2  An arched top and back, not flat. 3  Moveable adjustable bridge. Full hollowbody semi-acoustic instruments, such as the Gibson ES-175; these have a full-size sound box, but are still intended to be played through an amplifier. 2  Fully acoustic instruments with either a pressed laminate wood or hand carved top.