These safety pen tips are designed for insulin pens and similar injection devices. Each tip features an ultra-thin 31G needle measuring 5mm in length, tri-beveled and electropolished for smoother, more comfortable insertions. The integrated safety shield automatically covers the needle after use to prevent accidental needlesticks. The transparent shield allows clear visibility of the tip during priming, and a color-coded indicator disappears after activation to confirm the tip is permanently locked. Each box contains 100 tips with a universal design that ensures a tight fit.