Core Features of 3K Carbon Fiber Panels 3K Weave Definition: Each bundle of carbon fiber contains 3,000 individual filaments woven together in a warp and weft pattern. Structural Appearance: The surface shows a classic, delicate woven grid texture, giving it a high-tech, deep feel. Cross-Section Structure: When the side is precision-cut with CNC, you can see a high-density epoxy resin layered with multiple layers of heat-pressed carbon fiber forming a composite laminate cross-section. Surface Finish: Commonly comes in two types: Glossy and Matt (matte).