How should I maintain the ground joints?

Apply a thin layer of vacuum grease to the joints to ensure a tight seal and prevent sticking.

What is the lead time for orders?

Peak season lead time is within 15 workdays, while off-season lead time is about one month.

29 Ground Joint

Name: High Borosilicate Glass Splash Head 50ml with 29/32 and 24/29 Ground Joint
Brand: MSD (Tianjin) Glass Supply Co., Ltd.
SKU: 2148349882

Tianjin, ChinaMSD (Tianjin) Glass Supply Co., Ltd.

US$0.70

3,000 Pieces

Sample price:US$5.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

24hours

Warranty

12 Months Against Manufacturing Defects; 100% Comp

Model NO.

Bump Trap

Disposable

Non-Disposable

Certification

CE, ISO

Capacity

50ml,100ml,250ml,500ml,1000ml

Type

Bump Trap

Material

High Borosilicate Glass 3.3

Product Name

Rotary Evaporator Bump Trap

Top Joint (Female)

24/29&2/32 (Standard Ground Mouth)

Bottom Joint (Male)

19/26&24/29&14/23 (Standard Ground Mouth)

Color

Clear & High Transparent

Linear Coefficient of Expansion

$3.3 \Pm 0.1 \Times 10^{-6}/K$

Wall Thickness

2.5mm - 3.0mm

Technics

Hand Blown & Fine Polishing

Customized Service

Available (OEM/ODM/Logo

Application

Vacuum Distillation & Lab Extraction

Transport Package

Seaworthy Safety Packing

Specification

Single Unit Pack

Trademark

MSD

Origin

China

HS Code

7017900000

Production Capacity

720000PCS/Year

Key features

Premium Borosilicate Glass: Made of Borosilicate Glass 3.3 with excellent thermal shock resistance and chemical durability.

Safety Anti-Splash Design: Internal tube structure traps splashing liquids while allowing vapors to pass smoothly.

Standard Ground Joints: Precisely ground 24/29 and 19/26 joints ensure a vacuum-tight fit with standard lab equipment.

High Transparency: Clear visibility allows for easy monitoring of the distillation process and potential bumping.

Customizable Capacities: Available in 50ml, 100ml, 250ml, 500ml, and 1000ml to suit various lab needs.

OEM/ODM Service: Full customization available including logo, design, and minor modifications.

12-Month Warranty: Covers manufacturing defects for 12 months against quality issues.

ISO & CE Certified: Complies with ISO 3819 / DIN 12331 standards and holds CE certification.

Company profile

Fast DeliveryQuality AssuranceStandardized quality controlProduct Certification

MSD (Tianjin) Glass Supply Co., Ltd.

Tianjin, China

Business Type: Manufacturer/Factory, Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc.Export Year: 2026-01-01Nearest Port: tianjinAverage Response Time: ≤2.04h

AI-Powered supplier vetting

SummaryThe supplier demonstrates broad customization, ODM capability, recent new-product activity, inventory capacity, and OEM service for well-known brands. Finished-product inspection instructions are reportedly implemented uniformly, and quality assurance is stated. However, the supplier lacks overseas agents, branches, warehouses, showrooms, offline trade-show participation, and documented complaint or corrective-action procedures. Manufacturing capacity is also supported by no valid contract with related subcontractors. Financial information is reported only as zero values, which does not establish financial credibility. Certification details are insufficiently specific, and customer-case evidence is limited to OEM service for well-known brands, with no Fortune 500 cooperation reported.

Supplier typeThe supplier provides OEM and ODM services, supports customization from samples and designs through full or minor customization, maintains inventory capacity, and exports partly through agents. It has no overseas branches, agents, warehouses, or showrooms, indicating a primarily domestic or centrally managed export-oriented supplier rather than an internationally established service network.

After-Sales capabilityThe supplier lacks overseas agents or branches, overseas warehouses, and overseas showrooms, and offers services in zero listed countries. It also has no written procedures or records for complaint handling or corrective and preventive actions, providing explicit weaknesses in formal after-sales infrastructure.

R&D capabilityThe supplier reports new products during the past year, provides ODM services, and has one R&D engineer. It does not have an available SDK, but the evidence still explicitly supports active product development and design capability.

Production capacityThe supplier has inventory capacity, uses written instructions that are uniformly followed for finished-product inspection, and states that quality assurance exists. However, there is no valid contract governing manufacturing capacity between the factory and related subcontractors, which is an explicit production-management deficiency.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. It also provides ODM services, directly supporting broad customization capability.

Client casesThe supplier reports OEM service for well-known brands, which is direct evidence of at least one notable customer-service type. However, it reports no cooperation with Fortune 500 companies, and no customer names, case details, or broader reference portfolio are provided.