Fighter Jet Rotacrylic Pen BlankFighter Jet Rotacrylic Pen Blank From Jeff! This is one in a series of blanks to celebrate all those that served the US armed forces. This one is for all brave fighter pilots. A fighter jet is shown in silhouette against a background of sky blue and white resin. This blank will fit any mid size pen. This amazing piece of workmanship involved many hours of design cutting on a CNC, including thousands of lines of code. Once cut, the upper blank was re