Materials Used:
Body/Trigger: Polypropylene (PP) or Polyethylene (PE)
Nozzle: PP or Acetal (for precision)
Dip Tube: PP or HDPE
Gasket/Seals: EPDM (optional for chemical resistance)
Advantages:
Lightweight & corrosion-proof
Chemical-resistant (vs. metal springs)
Cost-effective for mass production
Recyclable (often #5 PP)