embecta Micro-Fine™ 8mm 31G Pen Needles (321100) are sterile, single-use pen needles designed for use with compatible pen injection devices. Each needle has a length of 8 mm and a fine 31G (0.25 mm) gauge.
This is the updated embecta-branded equivalent of the previous BD Micro-Fine+ 8mm 31G pen needle (reference 320631). The product is supplied in the current embecta packaging shown in the photographs.
Product details
- Brand: embecta
- Product range: Micro-Fine™
- Manufacturer reference / MPN: 321100
- Needle gauge: 31G (0.25 mm)
- Needle length: 8 mm
- Pack size: 100 pen needles
- Use: sterile, single-use pen needles
- Latex statement: not made with natural rubber latex (as stated on the package)
- Country of manufacture: Ireland (as stated on the package)
Pen compatibility
According to the packaging, Micro-Fine™ pen needles are compatible with a wide range of widely used pen injection devices, including selected pens from Lilly, Novo Nordisk, Sanofi, Pfizer, Sandoz and Viatris. Compatibility varies by pen model; always check the manufacturer’s compatibility information and your pen device’s instructions before use.
Use and disposal
Use a new sterile pen needle for each injection and dispose of the used needle in a suitable sharps container. Always follow the manufacturer’s instructions and advice from your healthcare professional.
Manufacturer Instructions & Injection Guide
Please refer to the manufacturer’s instructions supplied with the product and the embecta Injection Technique Guide before use.
Previous BD reference
Customers familiar with BD Micro-Fine+ 8mm 31G reference 320631 should note that the corresponding current embecta product is reference 321100. This listing is for embecta-branded stock.
Business and trade enquiries
For larger quantities or repeat orders, contact Mediquip Medical Supplies at info@mediquip.co.uk.









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