ONE-CARE OPTI Safety Pen Needles are 100% Safe as needle is automatically shielded and never exposed to prevent risk of accidental needle-sticks. Transparent shield allows clear visibility of the needle tip for easy priming. After use, color-coded inner shield will disappear to confirm that the needle is permanently locked and can be safely disposed. Ultra-Thin 30G x 8mm needles are tri-beveled, electropolished and lubricated gentle insertion and enhanced user comfort. Universal design ensures tight fit and compatibility with different pens. Delivered in compact box of 100 pieces.