FOUR BROTHERS CO., LTD. - A professional manufacturer of snap fasteners, studs, rivets, buttons, buckles, eyelets, garment accessories and fashion ornaments.

Four Brothers FAQ: Testing & Compliance FAQs

Learn about the testing and compliance support available for different project and market requirements. The FAQs below cover physical, mechanical, corrosion, and chemical testing, as well as requirements related to CPSIA, REACH, RoHS, OEKO-TEX Standard 100, and third-party testing through laboratories such as SGS and Intertek. Get the snap button size chart (Ligness/mm) plus plating color and stone color standards in one place. Use Four Brothers references to speed up approvals and reduce back-and-forth on specs.

Testing & Compliance FAQs | Custom Options & Finishes - Four Brothers

Testing & Compliance FAQs | Since 1976, Four Brothers has provided OEM manufacturing solutions for metal components, garment accessories, and decorative hardware. Our core capabilities include stamping, deep drawing, die casting, and custom tooling to support both standard products and customized requirements.

Testing & Compliance FAQs

Learn about the testing and compliance support available for different project and market requirements. The FAQs below cover physical, mechanical, corrosion, and chemical testing, as well as requirements related to CPSIA, REACH, RoHS, OEKO-TEX Standard 100, and third-party testing through laboratories such as SGS and Intertek.

What tests can you provide, such as pull, nickel-free, or lead content testing?

We can arrange physical, mechanical, corrosion, and chemical testing through third-party laboratories such as SGS and Intertek based on project requirements.
Formal test reports may include:
• Physical & mechanical tests: Pull and retention force tests, tensile strength tests, and dimensional verification.
• Corrosion & chemical tests: Salt spray testing, lead-free testing, and nickel-free / nickel-release testing.

Can your products meet CPSIA, REACH, RoHS, or OEKO-TEX Standard 100 requirements? Can you provide test reports?

Our materials and surface finishes can be produced and tested according to applicable project and market requirements, including CPSIA, REACH, RoHS, and OEKO-TEX Standard 100 requirements where applicable.
Testing can be arranged through accredited third-party laboratories such as SGS and Intertek, and relevant test reports or material compliance documents can be provided upon project request.

Four Brothers FAQ: Testing & Compliance FAQs

Use the snap button size chart to convert Ligness (L') and mm quickly when selecting hardware for garments and accessories.

Four Brothers also provides plating color standards and acrylic/glass stone color references to reduce sampling delays and miscommunication.

Send your target size, finish, and application—our team can recommend matching snaps, rivets, studs, and buttons.