Are these stoppers disposable?

No, they are non-disposable and designed for durable, long-term laboratory use.

What joint sizes are supported?

They are designed for standard taper joints, specifically B24 and B29.

Is customization available for other products?

Yes, we offer flexible customization including samples, designs, and full customization for PFA/PTFE components.

Chemical Resistant PTFE Stoppers for Flask, Non-Stick, B24 and B29 Joints

Name: Chemical Resistant PTFE Stoppers for Flask, Non-Stick, B24 and B29 Joints
Brand: Nanjing Binzhenghong Instrument Co., Ltd.
SKU: 1977203521

Jiangsu, ChinaNanjing Binzhenghong Instrument Co., Ltd.

US$15.00

1-9 Pieces

US$10.00

10+ Pieces

Product specifications

Size

Product profile

Customization

Available

After-sales Service

14 Days

Warranty

14 Days

Model NO.

PTFE-SPSZ

Disposable

Non-Disposable

Reactant State

Liquid

Material

Rubber / Plastic

Transport Package

Carton

Specification

B24/B29/made-to-order

Trademark

NJbinglab

Origin

China

HS Code

3926

Key features

Chemical Resistance: Inert to strong acids, bases, and aggressive solvents for safe handling.

Heat Tolerance: Withstands wide temperature ranges without degrading for heating applications.

Non-Stick Surface: Prevents contamination and ensures effortless cleaning and residue-free use.

Durable Material: Made from pure PTFE, flexible yet tough for a long service life.

Reliable Seal: Snug fit for standard taper joints (B24/B29) to prevent leaks.

Custom Fabrication: Tailored PFA/PTFE components with complex geometries and precise tolerances.

Fast Standard Shipping: Standard models ship within 3 days for urgent lab needs.

Expert Support: 30+ years experience in high-purity labware with global supply support.

Company profile

Years of Export ExperienceSelf-brandedFast DeliveryCustomization from Samples

Nanjing Binzhenghong Instrument Co., Ltd.

Jiangsu, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 11 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤4.55h

AI-Powered supplier vetting

SummaryThe supplier is identified as a professional technical supplier with customization, ODM, and OEM capabilities, including services based on samples and designs. It has two production lines, reports a one-month average lead time in both peak and off-season periods, and has exported goods for 11 years, with exports representing 31%–40% of total sales. However, it does not provide 3D software design services, has no SDK, inventory, overseas warehouse, overseas showroom, overseas agent or branch, or stated overseas service coverage. Quality assurance is reported, but finished-product inspection is performed by packing staff, raw-material traceability is absent, and complaint handling lacks written procedures or records. Manufacturing controls also lack continuous quantity reconciliation and outsourcing SOPs. No certification information is provided, while sustainability-related compliance statuses are unknown.

Supplier typeThe supplier is explicitly identified as a professional technical supplier. It also provides ODM services and OEM services for popular brands, indicating a technical manufacturing and design-oriented supplier profile.

After-Sales capabilityThe supplier has one-month stated lead times and six qualified service-capability suppliers, but it has no overseas agents or branches and offers service in zero countries. Customer complaint handling has no written procedures or records, indicating a documented after-sales weakness.

R&D capabilityThe supplier has R&D capability and offers ODM services, but it has no available SDK, does not provide 3D software design services, and reported no new products during the past year. This shows some development capability but a clear limitation in recent product innovation and software-related support.

Production capacityThe supplier operates two production lines, reports a one-month average lead time in both peak and off-season periods, and has exported goods for 11 years. However, it has no valid manufacturing-capacity contract with related subcontractors, no inventory capacity, and lacks continuous batch quantity reconciliation and outsourcing SOPs, creating documented production-control deficiencies.

Customization capabilityThe supplier explicitly supports customization from samples, designs, full customization, minor customization, and flexible customization. Its ODM and OEM capabilities further support the conclusion that it can handle customized product development and manufacturing.

Client casesThe supplier reports OEM services for popular brands and has 11 years of export experience, with exports representing 31%–40% of total sales. These statements provide evidence of brand-serving and international customer experience, although no specific customer names or case details are supplied.