• Fits perfectly inside Optimum syringe barrels
• Unique channels that prevent air entrapment while providing a smooth profile radius to reduce fluid shear
• Manufactured in EFD’s own certified silicone-free facilities in the United States and are certified for industrial use

EFD’s Optimum® black neoprene syringe barrel pistons are made of neoprene and fit tighter than other pistons in the Optimum series. They're recommended for manual dispensing of thick fluids and can be used with Optimum syringe barrels and Hand Plungers.