This is a Large sized Shockoe Bottom in Japanese Ebonite and a crazy mix of lava explosion alumiltes.  The pen has many different colors in the body with the cap and remaining parts of a jet black ebonite.  The pen measures 147 mm capped and 130mm opened.  Diameter of the cap is 17.75mm with a nice rounded profile, the body diameter is 14.5mm and tapers down to allow the pen to post.  You will have your choice of a #6 Jowo polished nib.  The pen also comes with a standard international converter.  This pen can be used as an eye dropper pen with use of silicone grease on the threads. Pen also comes with a Rickshaw bag works pen sleeve.