This 15mL dropper bottle is made of white colored low density polyethylene (LDPE) manufactured to strict quality control standards. White LDPE helps protect UV sensitive samples. Screw cap has a 15-415 thread finish. Dropper tip and dropper bottle cap sold separately. Material: LDPE. Color: White. Thread Finish: 15-415. Capacity: 15mL. Wheaton #: W242835.