Shop Insulin Pen Needles built for comfort, consistency, and confident daily dosing. This collection highlights trusted BD Ultra-Fine and BD Nano options in the most-requested lengths and gauges—so you can match needle size to patient technique with minimal guesswork.
Featured picks
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BD Nano PRO Ultra-Fine 4 mm x 32G — our go-to short, ultra-thin option designed to help reduce insertion force and support comfortable subcutaneous delivery.
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BD Nano Ultra-Fine 4 mm x 32G — proven 4 mm length with ultra-fine gauge for smooth, reliable injections.
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BD Ultra-Fine 5 mm x 31G — a versatile mid-length choice for users who prefer a touch more reach while maintaining comfort.
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BD Ultra-Fine 8 mm x 31G — familiar longer length for those trained on traditional technique.
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Needle Pen 32G x 4 mm PRO 100EA/BX (BD320555) — convenient box for routine refills and standardized clinic supply.
Why clinicians choose these sizes
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4 mm 32G (Nano / Nano PRO): short, ultra-thin profile to help support correct subcutaneous placement across Body Mass Index ranges when used as directed.
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5 mm & 8 mm 31G: additional length options for users following specific clinical guidance or legacy training.
Always follow your prescriber’s recommendations and device IFU for technique, site rotation, and needle length.
Compatibility & workflow
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Designed to fit most major insulin pens (brand-specific exceptions may apply—check your pen’s instructions).
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Sterile, single-use needles in practical cartons or boxes for home and clinic.
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Clear size labeling (length × gauge) to simplify reordering and reduce cabinet errors.
How to choose
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New starts or sensitivity concerns? Start with 4 mm 32G and confirm comfort and glucose control with your care team.
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Prefer a familiar feel? Select 5 mm 31G or 8 mm 31G per training.
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Need predictable inventory? Pick the BD320555 4 mm 32G PRO 100-count box.
Stock up today and keep dosing simple: browse BD Nano PRO, BD Ultra-Fine, and related insulin pen needles in the exact size your plan calls for—fast shipping, fair pricing, and dependable, clinic-grade quality.

