Organic seal, 40 mL.  Package of 10.  Includes the following:

• Seal: 
  • Color: Black
  • Size: 40 mL/min, 0.25 Inch I.D.
  • Type: Organic
  • Material: Graphite Reinforced PTFE
  • Energizer: 302 Stainless Steel Spring
  • Seal backup washer (brown)