Polypropylene Barrel/Plunger, For measuring and dispensing fluids/chemicals, lab use & experiments Great for Refilling and Measuring E-Liquids, E-cigs, E-juice, Wood Glue, Glues, Adhesives, Light Oil Great for essential oil, science lab, flat back rhinestones, hobby crafts, home or industrial precision applications of CA glues, inks, perfume, lubricants, sealants etc.