Sterile Pen Needle Replacements (31G x 8mm) – Precision & ComfortOur sterile pen needle replacements are engineered for smooth, accurate, and consistent delivery in research applications. Featuring a 31-gauge, 8mm design, these needles provide a fine, ultra-sharp point for reduced resistance and enhanced precision. Designed for compatibility with most standard pen-style systems, they ensure reliable performance in controlled research settings.Each needle is individually sealed and sterilized to maintain maximum safety, cleanliness, and integrity for professional use.Product Features: 31G x 8mm fine-gauge needle for precision and controlled delivery Ultra-sharp design for smooth, low-resistance application Sterile and individually packaged for single use Secure fit compatible with most standard pen systems High-quality construction for consistent, dependable performance Available Options: 5-Pack Needle Replacements – Ideal for light or occasional use 20-Pack Needle Replacements – Best value for ongoing or high-frequency research needs Whether you need a small refill or a larger supply, these pen needle replacements deliver the precision and consistency required for professional research environments.