Premium Materials Backed by Superior Craftsmanship
| Material | Composition | Benefits/Advantages |
| National Standard 59-A Brass | Contains at least 59% copper and 1.0-1.6% lead, meeting national standards. | - High copper content ensures excellent electroplating quality, reducing the risk of oxidation and discoloration over time. |
| - A reliable and durable solution for standard commercial and residential faucets. | ||
| Lead-Free Brass (NP) | Contains at least 59% copper with a lead content of ≤0.25%, complying with U.S. standards for direct drinking water. | - Health-Friendly: Designed to meet the highest safety standards, ensuring no harmful lead exposure. |
| - High Manufacturing Standards: Processing lead-free brass requires advanced manufacturing expertise due to its complexity and higher costs. Coign is one of the few manufacturers capable of mastering this material. | ||
| 304 Stainless Steel (ST) | Contains at least 8% nickel, ensuring superior rust resistance. | - Exceptional corrosion resistance, making it perfect for humid environments such as kitchens and bathrooms. |
| - Aesthetic appeal with a sleek, modern finish that complements contemporary designs. |
Industry Material Overview
Copper Materials
| Material | Composition | Remarks |
| Mixed Brass | around 55% copper, >3% lead | Does not meet national standards; poses health risks. |
| National Standard 59 Brass | ≥59% copper, 1.0-1.6% lead | Meets national standards; ensures good durability and electroplating quality. |
| Lead-Free Brass | ≥59% copper, ≤0.25% lead | Complies with U.S. drinking water standards; difficult and costly to process, limiting the number of capable manufacturers. |
Stainless Steel
| Material | Composition | Remarks |
| 201 Stainless Steel | around 5% nickel | Prone to rust; not suitable for long-term use. |
| 304 Stainless Steel | ≥8% nickel | Excellent rust resistance and durability; ideal for kitchens and bathrooms. |
Why Choose Coign?

