Gear Shift Action:

• The patent-pending and most unique feature of the MT Pen. Each pen refill is linked to a specific gear, allowing you to change pen colors through gear shifting.
• Multiple precision-engineered components work together to create a smooth, mechanical shifting action inspired by real manual transmission car.

Cartridges:

• Mitsubishi Uni-ball Style Fit Refills (6EA Included. Black, Red, Blue, Orange, Green, Purple)
  
  

Weight & Dimensions:

• Weight: 20g / 0.71oz

• Length: 150mm / 5.9"

• Diameter: 12.6mm / 0.496" (Pen Grip Section)

Materials:

• PETG Translucent, CNC Machined SUS304 Gear Stick

About this product. 

Due to the characteristics of 3D-Printed products, slight irregularities such as layer lines, surface texture, and other tiny imperfections are considered normal :)