Syringe has hand-fitted barrel and plunger. Teflon® sealing ferrule and threaded hub are adjustable to compensate for wear. Needle is removable, and seats to zero graduations. Accuracy ±1% of volume, with ±1% repeatability. Standard 2"" needle provided is 26S gauge for 5 µl and 10 µl syringes, 22S for 25-250 µl syringes, and 22 for 500 µl syringes.