UltiCare VetRx Pen Needles 31 gauge x 1/4" - 100 Pack are pen needles designed for veterinary use and can be used in Type A insulin pens. VetRx pen needles are sterile, safe, and convenient. Please note we are unable to accept returns of syringes or needles.

• 31g x 1/4 inch (0.25 mm x 6 mm)
• Works with insulin pens like Autopen, BD Pen, Flex Pen, Humalog Pen, and more
• Designed with the finest materials available
• Manufacturer information and usage

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