[MATERIAL] Our black ball bearing door hinges are made of stainless steel, suitable for extreme weather conditions. [SIZE] This 4-inch (100mm) square corner hinge is designed to fit various types of doors in residential settings. [FANTASTIC FINISH] The black finish resists fingerprints and provides a sleek appearance. With superior surface treatment, these hinges offer corrosion resistance, moisture resistance, and aging resistance, making them ideal for use on warehouse doors, kitchen doors, or outdoor applications. These features contribute to an extended lifespan under normal conditions. [BALL BEARING] Equipped with ball bearings for smooth and quiet operation, ideal for commercial or high-traffic doors. Each leaf is 3mm thick. Meets ANSI/BHMA A156.1 Grade 1 standards. NO SQUEAK EVER – Designed with electroplating coatings for high rust resistance. Includes damping oil to minimize metal-to-metal friction. Colour: Black Material: Stainless Steel Size: 10 x 10 cm Package Contents: 3 x Door Hinges Note: Light reflection and display differences may cause slight variations in color. Measurement may vary by +/- 1-3 cm.