SHXSHXRequest a quote

Longgang District, Shenzhen. Since 2012.

OEM is not customization. It is controlled manufacturing.

SHX wrote that on their own factory page. The rest of it is worth reading too:

Many suppliers describe OEM as "logo printing + color changes." That’s not OEM. That’s surface-level modification. Our OEM capability starts deeper, at the engineering, structure, and production feasibility level. We don’t just produce your design. We validate whether your design can survive real-world use, mass production, and long-term consistency.
The material dossierHow they work
A hall of moulding presses in a single row, which is where the silicone, FKM and TPU straps are formed.
A hall of moulding presses in a single row, which is where the silicone, FKM and TPU straps are formed.

2012

Established

100 to 150

Employees

200

Piece MOQ, negotiable

7 to 10

Business days to a prototype

ISO 9001

Certified quality system

Every figure is SHX’s own. Their About page and quality page both say 2012; their FAQ says 2008. The two that agree are used here, and the third is printed on the Method page rather than dropped.

Seven materials, seven different test lists

This is the part of SHX’s site that no competitor page answers. Each material is inspected on its own properties, and the properties are not interchangeable: silicone is checked for skin contact, FKM for what degrades it, leather for how it ages, textiles for how they wear.

  1. Silicone48Tensile strength, Tear resistance, Elastic recovery, Colour consistency, Skin-contact safety
  2. FKM and rubber24Chemical resistance, UV resistance, High-temperature performance, Aging resistance
  3. Leather48Surface quality inspection, Thickness consistency, Colour fastness, Flexibility testing
  4. Stainless steel28Salt spray resistance, Buckle pull strength, Surface durability after finishing
  5. Nylon16Abrasion resistance, Weaving consistency, Colour stability
  6. Canvas4Abrasion resistance, Weaving consistency, Colour stability
  7. TPU and TPE35Tensile strength, Elastic recovery, Colour consistency

Open the dossier

Six tests, in their own words

Run in house, on the rig below.

Tensile strength
Evaluates the force required to stretch or break watch strap materials under load.
Buckle pull
Verifies the structural reliability of buckles, spring bars, and connection points.
Fatigue
Simulates repeated bending and daily wearing conditions.
Salt spray
Assesses corrosion resistance of metal components and buckles.
Abrasion
Measures wear resistance of strap surfaces during prolonged use.
Colour fastness
Ensures material colors remain stable under friction, moisture, and environmental exposure.
An operator in cap, coat and mask loading a ten station test rig. SHX runs tensile, buckle pull, fatigue, salt spray, abrasion and colour fastness tests in house.
An operator in cap, coat and mask loading a ten station test rig. SHX runs tensile, buckle pull, fatigue, salt spray, abrasion and colour fastness tests in house.

They also write

Twelve pieces through 2026 on tariffs, material resilience, colour data and how to vet a supplier. Almost no strap factory publishes anything like it, and almost nobody finds it.

The full index