1800 Series Syringes The 1800 series syringes are the reinforced plunger version of the 1700 series syringes. Attached to the flange of the syringe is a blue Syringe Holder. The Syringe Holder provides a spot to hold the syringe that will not heat up the barrel causing dispense inaccuracies. Additionally it provides support to small volume plungers that are prone to bending during injections. This series of gas tight syringes is ideal for dispensing volumes from 1 µL up to 250 µL.