Panel material: High-definition acrylic panel; Back panel material: KT board; Frame material: High-strength aluminum alloy. Lightweight and sturdy, corrosion and rust resistant. Installation: Easy installation, comes with screws and suction cups, can be installed horizontally or vertically. Easy Replacement: Magnetic opening, no disassembly required for image replacement, convenient and quick poster change Packaging: 5-pack silver 10mm thick aluminum alloy A4 photo frames, rounded corner design, safe and reliable. Note: The panel surface has a protective film at the factory; simply peel it off before use.