Roller erasable blue (0,7) gel ink

A roller with gel ink that can be erased with an eraser installed on the barrel.
Comfortable rubber grip that adheres to the fingers.
Ball diameter: 0.7 mm
Print line thickness: 0.45-0.75 mm
Amount of ink: 0.8 mg
Print length: 180 meters
Expiration date:: 1 year
Barrel diameter: 14.90 mm
Roller length: 144.5 mm
Roller weight: 9.13 mg