Hamilton offers two different plunger support devices. The Syringe Guide has two metal guide rods that preserve plunger alignment and prevent plunger bending. The Chaney Adapter uses three metal guide rods. The third rod has an adjustable stop that facilitates repeatable placement of the plunger. For the 800, 900, and 1800 series syringes that already have a supported plungers the Chaney Adapter improves plunger placement.