BD Ultra-Fine Short 31g Pen Needles coated with special Micro-Bonded™ lubrication for a more comfortable injection with no "pinch-up" of skin required. The Ultra-Fine Short Insulin Pen Needles are sufficiently long to pass through the skin into the fat layer, but short enough that it does not touch the muscle.
The BD Ultra-Fine Pen Needles fit all diabetes pens in the US including pens for BD Pen, FlexPen, InDuo, Humalog, InnoLet, Innovo, NovoPen Junior, NovoPen 3ml, Humulin Pen, And many more! The paper tab and inner shield are color-coded purple or blue for easy size/gauge recognition.

Features:

• Engineered with optimal point geometry for maximum comfort and reliability. 
• Coated with special micro-bonded lubrication for a more comfortable injection. 
• Manufactured with the finest surgical steel available. 
• Subject to 100% needle point inspection to assure consistent high quality.

Specifications:

• Ultra Fine Short Insulin Pen Needles Product Number: 320109
• Needle Gauge: 31.
• Needle Length: Short Pen Needle - 8 mm (5/16 Inch).
• Color Code: Blue (Short Pen Needle).
• Needle Material: Surgical Steel.
• Hub Material: Polypropylene.
• Application: Insulin Pen Needle.
• Hub Connection: Pen Connection.
• Needle Type: Without Safety.
• Wall Type: Regular Wall.
• Latex free.
• Non-toxic.
• Non-pyrogenic.
• Single use only.
• Disposable.
• Sterile.
• Manufacturer: BD (Becton Dickinson.)