PREMIUM MAGNETIC - Whiteboard magnets are much stronger than regular , tested and the sturdy to 30 sticky notes or 17 A4 sheets at a time, just a small pushpin magnet MAGNETIC - Each office magnet measures 0.47x0.63 inches, the sturdy metal refrigerator magnets are cleverly designed to be -pull for better curvature and a sleeker look. Rust Resistant and Durable - Thumbtack magnets are made of neodymium and high quality stainless steel metal construction, magnets are plated with three layers (-copper-) to rust protection, look shiny, and greatly extend the life of refrigerator magnets. FEATURES - Whiteboard magnets are perfect for kitchens, offices, classrooms, refrigerators, hanging pictures, locker bulletin boards, magnetic maps, calendars, lockers, filing cabinets and other magnetic surfaces. PROFESSIONAL BRAND - strong magnets for refrigerators are manufactured under the 9001 quality system. Colour:silver :Metal Size: 12 x 16mm Package Contents: 30 x Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.