• Epidural needle are specialized, sterile, hollow needles used by anesthesiologists to deliver medication to the epidural space for pain management or anesthesia, such as during labor or surgery. They feature a curved, blunt tip to reduce the risk of puncturing the underlying dura mater, depth markings to guide placement, and a stylet to maintain the needle's stiffness. 

• 18-gauge (18G): This is a very common size for epidural procedures, typically with a pink hub.scape.

• 17-gauge (17G): Also used for epidural access, often with a violet hub.

• 20-gauge (20G): A smaller gauge used in some cases, with a yellow hub.