ZJ Pack 18-410 PP Serum Pump, 0.23cc Dosage with External Spring & Overcap

What this packaging is

Keeping metal out of the formula is the real story here. The 18-410 PP Serum Pump's external spring sits outside the pump body entirely, so liquid never contacts metal — a meaningful advantage for water-based serums, active-heavy eye creams, and pigmented formulas like foundations and primers where metal interaction can compromise stability. Built from polypropylene with PE gasket and dip tube, this 0.23cc dosage pump fits the standard 18-410 neck and delivers consistent, controlled dispensing. Decoration-ready with electroplating, spray coating, and water transfer printing options, it pairs clean black hardware with strong functional performance for skincare and complexion brands building cohesive, shelf-ready lines.

Why brands choose this

• Formula integrity through external spring design: The spring sits completely outside the pump body, eliminating metal-to-liquid contact — a critical consideration for oxidation-sensitive actives, vitamin C serums, and pigmented complexion products where metal exposure can degrade performance or alter color over time.
• Precision 0.23cc dosage built for high-efficacy formulas: Controlled micro-dosing is exactly what today's serum and eye cream consumers expect — it prevents product waste, supports a ritualized application experience, and reinforces the message that what's inside is potent and worth dispensing carefully.
• Decoration versatility supports strong brand differentiation: Electroplating, spray coating, and water transfer printing options give brand teams real flexibility to align this pump's black PP hardware with premium, editorial, or masstige aesthetics — all without switching components across a product range.

Decoration