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Westar® RU and RS Cartridge Plungers

The component solution for risk reduction

Patient needs are evolving and cartridge components need to support safe self-administration, dose accuracy and ease of use with a device. Drug development strategy can be simplified and manufacturing streamlined by selecting cartridge plungers in a ready-to-use-format.

Our industry-proven Westar component processing reduces the risk of variability and its potential effects on drug quality, safety and efficacy. Westar cartridge plungers can help reduce the risk of product loss and failures.

Westar cartridge components provide:

  • Tight particle level limits in specified size ranges
  • Enhanced device functionality, because of the optimized silicone level on the plungers
  • Lower levels of potential extractables
  • The confidence that your drug cartridge components are manufactured from market-proven elastomer formulations

Unique Designs to Meet Your Specific Applications
Every day, West is working by our partners’ side to design and manufacture drug packaging and delivery systems that will bring their drugs from concept to patient efficiently, reliably and safely. West's concept design, development, engineering and project management teams can facilitate all steps necessary to take a product from concept to commercialization, including full validation and chemical and functional testing. Custom components can be provided in ready-to-use or ready-to-sterilize formats.

Click here for a real world example of a custom development project between West and a customer.

Westar Video Poster with logos





Westar® is a registered trademark of West Pharmaceutical Services, Inc., in the United States and other jurisdictions.