6 mm micro. 6 mm x 32 g. Universal Fit (Brands are trademark of their respective owners): Lilly: HumaPen Luxura HD, Humulin Pen, Humalog Kwikpen, Forteo. Sanofi: Apidra SoloStar, Lantus SoloStar, Toujeo SoloStar. AstraZeneca: Byetta exenatide injection, SymlinPen. Novo Nordisk: Victoza, Levemir, Novolog, Novo FlexPen, NovoFlexTouch. Owen Mumford: AutoPen. Please refer to the manufacturer's insert that came with the pen device. Non-toxic, non-pyrogenic. Call: 1.888.Bdcares (1.888.232.2737). Visit: bd.com. Write: BD, 1 Becton Drive, Franklin Lakes, NJ 07417. Recyclable. FSC: Mix - Packaging from responsible sources. www.fsc.org. Made in Ireland.