The image shows a Cross gel rolling ball pen refill, specifically the #8523 model in black ink. It's designed for use with Cross rolling ball pens and provides a smooth writing experience similar to a fountain pen. Type: Gel rolling ball pen refill Brand: Cross Model Number: 8523 Ink Color: Black Compatibility: Designed for Cross rolling ball pens, some models can be converted to ballpoint or porous felt-tip pens by changing the refill. Features: Provides a smooth, free-flowing writing experience, and the gel ink won't dry out like standard refills. Available Colors: Black Origin: Cross is America's oldest manufacturer of writing instruments since 1846.
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