Tombow BR-SF33 Black Ink Refill Cartridge - Compatible with Tombow Ballpoint Pens, Smooth Writing for Office, School & Home Use

A fine-tip ink refill for Tombow's 0.7mm oil-based ballpoint pens.

Note: This refill is compatible with the following products: Airpress Epro BC-APA, Reporter Compact BC-FSRC/BC-TSRC/BC-WSRC, Reporter 4 Compact with Strap BC-FSRCV, ONBOOK BC-OB