The folding hinges are made of acrylic material, waterproof and lightweight, not easy to break or corrode and have long-term use without deformation. The hardware folding hinge with a smooth surface, turns smoothly without jamming which is convenient to use and can meet your daily crafts needs. Widely applied to home, office, hotel, shop, and more. Easy to install, just uses glue for sticking, you can stick it to the desired position you need without drilling holes that can protect the mounting plate. Please confirm the hinge size before purchasing it. The acrylic hinges are widely used for aquarium lids, acrylic boxes, jewelry boxes, acrylic display cases, glass boxes, display stands, small cabinets, drawers and DIY crafts. Material: Acrylic Total Size: 25 x 35mm/ 1inch x 1.38inch(L*W) Thickness: 2.5mm 4pcs x Acrylic Hinges