P4 SE Pen by EZ Rotary.
The lightweight design keeps the hand comfort and reduces the hand fatigue which allows the artist to work perfectly for the long session tattoo. Specifications:
Material: Aircraft aluminum.
Stroke Length: 3.5mm
For lining: 7.5V-9V For colour packing and shading: 6V-8.5V. RPM: 7000-9000