Designed for ease of use, this invisible door hinge offers a seamless integration into any home decor. Its automatic closing feature ensures doors are always properly shut, enhancing security and convenience. The transparent crystal design adds a sophisticated touch, making it suitable for various applications, from residential to commercial spaces, where both style and efficiency are essential. 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 -Self-closing mechanism door hinge: automatically closes doors to improve security, ideal for residential and commercial spaces -Invisible appearance door hinge: hidden hinges blend seamlessly with door frames, preserving the beauty of your interior design -Heavy-duty spring door hinge: built to endure frequent use, the spring system ensures reliable and operation -Stylish clear design door hinge: transparent hinges provide a sleek and modern look, suitable for enhancing the aesthetic of any room -No-noise operation door hinge: smooth and silent functionality eliminates door noise, creating a calm and peaceful environment Package list: 10 x Hinge 40 x screws