ZJ Pack 20-400 PP Slim Serum Pump, 0.23cc Dosage with External Spring & Overcap

What this packaging is

An external spring design sets this pump apart — by keeping the spring outside the pump body, liquid never contacts the mechanism, protecting formula integrity for serums, moisturizers, and foundations prone to degradation. The 20-400 PP Slim Serum Pump delivers a precise 0.23cc dose per actuation, making it a strong fit for high-value face serums and skin treatments where dose control matters. The slim profile, glossy collar, and clip-lock overcap give it a polished, shelf-ready look. Decoration options include electroplating, spray coating, and water transfer printing — giving brand teams real flexibility to customize without switching components.

Why brands choose this

• Formula-safe external spring mechanism: The spring sits outside the pump body entirely, eliminating metal-to-liquid contact. This is a meaningful advantage for serums and actives — acids, vitamin C, and enzyme-based formulas that can degrade or discolor standard internal-spring pumps stay protected, reducing reformulation risk and extending shelf life.
• Precision 0.23cc dosage built for premium skincare: Controlled dosing is increasingly expected in face serum and moisturizer formats, where consumers and brands alike are focused on avoiding waste and delivering consistent application. This pump's metered output supports that ritual and reinforces the perception that the formula inside is worth treating carefully.
• Decoration versatility for brand differentiation: Electroplating, spray coating, and water transfer printing are all on the table — which means this pump can shift from a clean, minimalist look to a metallic or patterned finish without sourcing a different component. For brand teams developing multiple SKUs or seasonal editions, that flexibility simplifies development timelines.

Decoration