The barrel plunger BT series is used to ensure that the pressure is spread evenly across the fluid surface to provide consistent dispensing even for high viscosity materials. These barrel plungers are recommended for most general applications as they require less pressure to dispense, prevent air entrapment and ensure no material residue is left on the syringe barrel walls by wiping the syringe barrel wall clean with its precision wiping edges during dispensing. It is sold in bulk and packs of 50 pieces.