This self-closing invisible door hinge is designed to provide a seamless and automatic closing mechanism for doors and windows. Its transparent crystal appearance ensures it blends effortlessly with any decor, providing both functionality and aesthetic appeal. Ideal for modern homes, it ensures doors close quietly and efficiently, enhancing convenience and security. Features -Color:Transparent -Material:Acrylic, stainless steel -Size:4.50X2.20X2.00cm/1.77X0.86X0.79in -Screw hole: 4mm Hole spacing: 22mm, 25mm -Note: Suitable for use with boards ranging from 2 to 6mm -Auto-rebound design door hinge: enhances home safety with a self-closing mechanism, ideal for spaces requiring privacy such as homes and offices -Invisible installation: seamlessly integrates with door frames, preserving your interior design and adding a touch of modern minimalism - spring mechanism: built with high-strength springs that maintain elasticity even with frequent use, ensuring performance -Transparent aesthetic: crafted with clear materials for a stylish and elegant look, suitable for contemporary homes that value both -Silent operation door hinge: precision-engineered for smooth and noiseless door movement, creating a peaceful and comfortable living environment Package list: 8 x Hinge 32 x screws