What materials are used in the construction of the Pentel EnerGel-X pen?

The Pentel EnerGel-X pen is made of 84% recycled plastic.

What is the tip size of the Pentel EnerGel-X Roller Gel Pen?

The tip size of the Pentel EnerGel-X Roller Gel Pen is 0.5 mm.

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Pentel EnerGel-X Retractable Roller Gel Pen .5mm Red Barrel/Ink Dozen BLN105B

Sold as 1 Dozen.
Fine Point, 0.5 mm. Made of 84% recycled plastic. Latex-free grip for maximum comfort and control. Limited Lifetime Warranty.
Soft latex-free grip for comfort and control. Red Ink. Needle tip writes fine lines. 12 pens per box. Safety Data Sheet.
Attractive color-tinted barrels with curved clip design match ink color. Features EnerGel Ink Inside - Ultra smooth ink line which is quick -drying and is ideal for left-handers - no smears, no smudges and no globs. Intense, acid-free ink dries quickly without smearing or blotting, making it ideal for left-handed writers.
Quick drying ink formulation is ideal for lefties. High performance ink technology combines the best qualities of liquid and gel ink for a super-smooth writing experience. Refillable with any color EnerGel refill.