This cartridge was offered as a substitution for the usual brand that matches my pen. It was a tiny bit smaller so I just snapped it into the pen back and it was seamless. Actually easier than the Faber Castell cartridge which is slightly tougher to pierce the back to get the ink to flow. Great black color. Wonderful feel of flow.
took the USPS a few extra days to get the package to the residence. stated to have arrived in Springfield on Saturday, but did not receive the package till the following Tuesday, might have been because of Presidents Day