The AllFlex Syringe O-Ring 50MR is a replacement O-ring designed for use with AllFlex syringes. It is made of a durable, flexible Rubber material that helps to create a tight seal within the syringe barrel, ensuring that the syringe functions properly and accurately delivers the desired volume of liquid. The O-ring is compatible with 50 milliliter (mL) syringes. It is an essential component of the syringe and helps to prevent leaks and ensure consistent performance. Replace worn or cracked O-rings to prevent loss of vaccine. Replacement rubber O-ring on the plunger of the Allflex repeater syringes. Available for the 50 ml syringe.