ONE-CARE PRO Safety Pen Tips are safe as tip is automatically shielded and never exposed. Transparent shield allows clear visibility of the tip for easy priming. After use, color-coded inner shield disappear in the window to confirm that the tip is permanently locked and can be safely disposed. Ultra-Thin 31G tips are tri-beveled, electropolished gentle insertion and enhanced user comfort. Universal design ensures tight fit and compatibility with different pens. Delivered in compact box of 100 pieces.