Material: the push pins are made of hard plastic and stainless steel with the needle end, they are suitable for home or office and easy to apply Package: includes 500 pack pins totally coming with a clear box, they are very convenient to store and enough for meeting your needs to pin something Dimension: the small black ball diameter is 0.3 cm/ 0.13 inch; Total length: 1.5 cm/ 0.59 inch; Proper size is good for your application Function: these black map push pins can be widely applied for marking locations on maps, art designs, DIY crafts, pinning the pictures, papers notice on cork boards and more Notice: please use the pins on soft cork boards, soft wood and cloth boards, and do not push with too much pressure while apply; And keep them away from children