General description Whiteboard/fridge magnets are made from neodymium magnets and acrylic. These small yet powerful magnetic push pins can hold up to 7 sheets of A4 size paper (80gsm) each. They are safe to use on any magnetic surface, sticking to all metal surfaces without leaving marks. This set includes 42 pins in 7 vibrant colors: orange, green, blue, pink, yellow, purple, and clear, with 6 pins of each color. Technical specifications Material: Neodymium and acrylic Size: Diameter 11mm x Height 17mm Weight capacity: Holds up to 7 sheets of A4 paper (80gsm) per pin Other information Warning for children: Keep away from children, swallowing magnets is extremely dangerous. Parental supervision required.