The 4B front door hinge 4x4x3mm from Sunshine Hardware is built from durable stainless steel, offering smooth door operation and long service life for residential and commercial entry doors. Thanks to its corrosion-resistant 304 stainless steel material, this heavy-duty stainless steel door hinge performs well in humid, coastal, and outdoor environments. It’s easy to install, stable under frequent use, and supports applications such as wooden doors, metal doors, and security entryways. Sunshine Hardware also provides custom hinge sizes, OEM/ODM options, and bulk ordering to meet project needs.