20mm 20-410 Black Calibrated Glass Dropper for 2 oz PET Bottles | Graduated Dropper Supplier
Product Overview

This 20mm 20-410 black calibrated glass dropper is designed for 2 oz PET Boston round bottles, providing a precise and reliable liquid dispensing solution for a wide range of applications.

As a professional graduated glass dropper supplier, we offer stable bulk production and consistent quality, ensuring compatibility with industry-standard PET packaging commonly used in cosmetic, pharmaceutical, essential oil, and chemical products.

Equipped with a 77 mm graduated glass pipette, this dropper enables accurate and repeatable dosing. The combination of a glass tube and rubber bulb ensures smooth liquid uptake and controlled dispensing, making it ideal for formulations that require precision.

Key Features
Calibrated Glass Pipette for Accurate Measurement
Graduation marks allow precise and repeatable dosing
Designed for 2 oz PET Boston Bottles (20-410)
Compatible with standard PET containers and 20-410 neck finish
77 mm Pipette for Optimal Reach
Ensures efficient liquid access and usability in medium-depth bottles
Smooth & Controlled Dispensing
Rubber bulb provides consistent suction and accurate liquid release
Durable Construction with Chemical Compatibility
Suitable for essential oils, serums, and various liquid formulations
Bulk Supply with Stable Quality
Ideal for distributors and brands requiring consistent production
Professional Black Finish
Enhances product appearance and packaging consistency
Specifications
Neck Finish: 20-410
Size: 20mm
Cap Material: Polypropylene (PP)
Pipette Material: Glass (Graduated, Straight Tip)
Bulb Material: Rubber
Pipette Length: 77 mm
Color: Black
Maximum Dispensing Volume: Approx. 0.75 ml (water-based liquid)
Compatibility: 2 oz PET Boston round bottles
Applications

This calibrated glass dropper for PET bottles is widely used for:

Skincare products
Essential oils
Pharmaceutical liquids
Cosmetic formulations
Chemical solutions
Important Notes
Graduation Mark Durability
Products containing ethyl alcohol or highly concentrated essential oils may affect or remove printed graduation markings over time due to their corrosive nature. Compatibility testing is recommended.
Calibration Standard
Graduation marks are based on water-based liquid testing. Actual dispensing volume may vary depending on liquid viscosity and formulation.
Customization Options

We offer flexible customization to meet your packaging needs:

Cap color and finish customization
Bulb material and color options
Pipette length and graduation customization
Logo printing and decoration
Why Choose Us
25+ years of packaging manufacturing experience
Integrated plastic and glass production capabilities
In-house mold development and customization
Stable bulk production with reliable lead times
Trusted supplier for cosmetic and pharmaceutical packaging
FAQ

Q1: What is the difference between 20-400 and 20-410 droppers?
20-410 droppers have a taller thread profile and are commonly used with PET bottles, while 20-400 is typically used for glass Boston bottles.

Q2: Is this dropper suitable for PET bottles?
Yes, it is specifically designed for 2 oz PET Boston round bottles with a 20-410 neck finish.

Q3: Are the graduation markings accurate for all liquids?
They are calibrated using water-based liquids. Oil-based or viscous liquids may vary slightly.

Q4: Do you offer bulk or wholesale supply?
Yes, we specialize in bulk and wholesale orders. Please contact us for pricing and samples.