OGIS Black Magnetic Push Pins are perfect for Whiteboard Magnets, Refrigerator Magnets, Dry erase magnet, and other magnetic surfaces. Specification: One metal magnet can hold up to 12 pieces of printer paperColor: BlackProduct weight: 2.8 oz Product size: 2.4 x 2.0 x 0.6 in Magnets size: 0.57 x 0.47 x 0.47 inch for each magnet Quantity: Set of 16 You Must Know Please keep in mind that magnets do not stick to non-metal materials such as wood, glass, plastic, textile, concrete, etc. However, many non-metal surfaces may have metallic properties, so these magnets will stick on them. DISCLAIMER In addition, in accordance with Amazon strong magnet policy, these magnets are not strong magnets because the exposed portion of these magnets all have a north polarity, which allows the magnets to adhere strongly to metal but have a weak connection to each other (flux between magnets is less than 50 kG2mm2). WARNINGSmall parts. KEEP AWAY FROM ALL CHILDREN. Do not put in mouth or nose.