[MATERIAL] Our black ball bearing door hinges are made of stainless steel, suitable for extreme weather conditions. [SIZE] Our black ball bearing door hinge is 4 inches (100mm) with a 4-inch (100mm) square corner, compatible with various types of doors in residential settings. [FANTASTIC FINISH] The matte black finish resists fingerprints and provides a sleek, modern appearance. With excellent surface treatment, these black door hinges offer corrosion resistance, moisture resistance, and aging resistance, making them ideal for use on warehouse doors, kitchen doors, or exterior applications. Our products provide a long service life under normal conditions. [BALL BEARING] Designed for extremely smooth and quiet operation, these hinges are ideal for commercial or high-traffic doors. Each leaf is a robust 0.118 inch (3mm) thick. ANSI/BHMA A156.1 Grade 1 certified. No squeaking — our door hinges are manufactured with electroplating coatings for high rust resistance and include a damping oil feature to reduce metal-to-metal friction. Color: Black Material: Stainless Steel Size: 10 x 10 cm Package Contents: 3 x Door Hinges Note: Only the items listed are included. Other products are not included. Light reflection and differences in display screens may cause slight variations between the color of the item in the photo and the actual color. Measurement may vary by +/- 1–3 cm.