XACTneedle™ Cartridge – Xtreme Precision Tight Round Liners Ultra-fine lines. Surgical control. Built for micro-detail. Designed for artists pushing precision to the limit, the #4 Xtreme Precision Round Liner delivers hairline-thin strokes with repeatable consistency. Leveraging 25+ years of medical-device manufacturing, each cartridge uses precision-ground Japanese stainless steel to keep ink flow smooth and controlled, pass after pass. Our custom-engineered mould increases tip stability to reduce vibration and needle wander—so your hand does less correction and your lines stay clean. Why artists choose #4 RL #4 (≈0.18 mm) “Super-Bugpin†diameter for ultra-fine line weight and micro-detail. Stability-first tip geometry for crisp starts/stops and predictable line travel. Optimized ink channel for consistent saturation with fewer passes. Clear, low-profile tip improves view of the needle and the skin for precise placement. EO-gas sterilized; lot & expiry printed on every sterile blister pack. Why artists choose #6 RL #6 (≈0.20 mm) “Super-Bugpin†diameter for ultra-fine line weight and micro-detail. Why artists choose #8 RL #8 (≈0.25 mm) “Super-Bugpin†diameter for ultra-fine line weight and micro-detail. The #10 liner configuration is prized for its tighter grouping, delivering precise lines, micro‑script, hairlines, and delicate detail—perfect when you need more control than a #12 liner can offer. Technical details Configuration: Round Liner (#4 / ≈0.18 mm), #6 / ≈0.20 mm, #8 (≈0.25 mm), #10 (≈0.30 mm) "Bugpin" diameter Steel: Precision-ground Japanese stainless Housing: Clear, medical-grade polymer; beveled visibility window Sterilization: EO gas · single-use · sterile blister Quality: Manufactured under rigorous medical-device standards with multi-point QC