ZJ Pack 24-410 Patented Variable Dispensing PP Slim Serum & Treatment Pump with External Spring & Adjustable Dosage (0.35cc - 0.48cc)

What this packaging is

An external spring that never touches your formula — that's the headline feature of the 24-410 Patented Variable Dispensing PP Slim Serum & Treatment Pump. Built for 24-410 neck finishes, this slim PP pump lets brands dial output between 0.35cc and 0.48cc with a simple clockwise or counterclockwise turn of the actuator — a patented mechanism that's genuinely rare at this price point. The external metal spring keeps liquid contact surfaces clean, making it a strong fit for sensitive face serums, moisturizers, and oil-based hair treatments. Decoration-ready via electroplating or spray coating, it's a functional workhorse that doesn't sacrifice shelf presence.

Why brands choose this

• External spring keeps formula uncontaminated: The spring sits outside the pump body entirely, so it never contacts product — a critical advantage for sensitive serums, actives-heavy moisturizers, and oil-based treatments where metal exposure can degrade formulas or trigger consumer concerns.
• Dial-in dosage without swapping components: Brands can toggle between 0.35mL and 0.48mL output by turning the actuator head — no tooling change, no secondary SKU. That flexibility is useful during formulation development when viscosity or dose targets are still being refined.
• Oil-based formula compatibility opens broader development options: Most standard pumps aren't validated for oil-rich formulations. This pump's oil-compatible design makes it a reliable fit for facial oils, serum-oil hybrids, and scalp treatments — categories growing rapidly as consumers embrace barrier-support and multi-phase routines.

Decoration