Blue plasic wiper piston that is used with 30cc and 55cc size dispensing barrels. Pistons ensure that the pressure is evenly spread across the fluid surface to provide consistent dispensing. Wiper seal pistons prevent dripping and eliminate material waste by wiping the syringe barrel wall clean as fluid is dispensed. Maximum operating pressure is 100psi (6.9 bar). Blue easy flow pistons are recommended for most general applications and they ensure no material residue is left on the syringe barrel walls while dispensing. Price is for a pack of 50 pistons. Please note - does not include syringe barrels. Order 30cc and 55cc barrels separately. Material: Polyethylene Colour: Blue For Barrel Size: 30cc and 55cc Height: 16.00 mm Outer Diameter: 22.63 mm