Westar® Syringe Plungers

Components prepared for pharmaceutical use

Westar® RU (ready-to-use) or RS (ready-to-sterilize) plungers can streamline manufacturing operations by eliminating many of the processes related to component preparation. 


West's validated wash process, Westar RS, is used to produce components that are ready for gamma or steam sterilization. Westar RS stoppers are available in a range of formulations, designs, and packaging options to help transition resource-intensive, non-core component preparation activities to an expert external partner.


West's validated steam sterilization process, Westar RU, is applied after the Westar RS wash process to produce components for direct introduction into filling operations. Westar RU components help manage regulatory and compliance risk, facilitate equipment and space management, and reduce ongoing validation activities.

The Westar RU and RS processes are supported by a DMF.

West has done the work to ensure components are easily integrated into manufacturing fill-finish operations. From concept to market, West helps customers meet the many packaging requirements for their components.

Small Volume:

  • Ideal for testing or sampling needs
  • Available products ship within 72 hours
  • Westar® washed, gamma or steam sterilized bag formats

Bulk Bags:

  • Ideal for traditional cleanroom filling lines
  • Applicable for use with restricted access barrier system (RABS) filling lines
  • Westar® washed, gamma or steam sterilized bag formats

Ported Bags:

  • Designed for use with alpha-beta rapid transfer port (RTP) systems
  • Interlocking system designed to open only when both port doors are properly docked and integrated
  • Ideal for restricted access barrier system (RABS) and Isolator filling lines
  • Westar® washed, gamma or steam sterilized bag formats






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