Roller Ball pen kits are the same kits as the FP series just with a roller ball nose cone. Currently the diamond pattern Nose Cone is only available on the RB5000 and RB 6000 serises pens.
Based on a 3/8 lower tube and 10.5mm upper tube.
Lower diameter of pen body .440
Cap diameter .480
Includes tubes , refill, spring, bushings, and Sterling Silver hardware
Roller ball front end, Schmidt Refill , choice of cap/finial style, clip.
Based on the 10.5 lower and 12.5 upper tubes this is our most popular size kit. It is comparable to most JR series kits.
Lower body diameter of .510
Upper cap diameter .570
Includes tubes , refill, spring, bushings, and Sterling Silver hardware/
Currently you can choose between smooth and the new diamond pattern.
This kit is com,parble to full sized Pens with a 14mm tube for the cap and 12.5mm tuibe for the bottom
Lower body diameter of .535
Upper cap diameter is .650
You can choose between the new diamond pattern of the classical smooth Nose Cone with your set.
A smaller pen using a 10mm lower tube and 11.5mm upper tube.
Lower body diameter of .460
Upper Cap diameter of .535
Smooth Nose cone only at this time
Slightly larger than the RB 7000 it is based on the same tubes.
Lower body diameter of .480
Upper Cap diameter or .560
Smooth Nose cone only at this time.