National Scientific all plastic syringes are free of rubber components or lubricants. These syringes are preferred for use with Target brand syringe filters. Polypropylene barrels and polyethylene plungers offer wide solvent compatibility, low background extractables and the convenience of a disposable product. All plastic syringes are available with capacities from 1mL to 50mL. Select Luer-Slip or Luer-Lok end fittings.