outer spring pump core
- Size: 14mm, 17mm, 20mm
- Material :PP, POM, PE,
- Introduction: The outer spring core is outsie the pump head, so it doesn’t direct contact with the liquid which is relatively hygienic. Furthmore, the power of the outer spring core is greater than built-in spring core , therefore the outer spring is more suitable for more viscous liquid, such as cream, lotions.
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