Vetrijec Polypropylene Hub Needles have clear hubs for easy viewing of flashback. Metal insert increases needle strength for animal health applications.Tri-beveled, anti-coring tips are computer-ground for consistent sharpness. Anti-friction coating to minimize penetration resistance and animal discomfort. Stainless steel cannula. Sterile, non-pyrogenic, auto-clavable components. Tamper evident cartridges are safe, convenient, easily disposed of and transportable.