Powerful Neodymium Bar Magnets Grade N45 3"x 1/2"x 1/8" 2 Pieces Stamping Magnets for DIY Stamping Using Creative Corners from Misti or Tim Holtz Stamp Platform Magnets Each Of These Bar Magnets Provides 16 Pounds Of Holding Power Maximum Working Temperature 176 F (80 C) Bar Magnet Material: Sintered Ndfeb Neodymium Rating: 13,500 Gauss Pulling Force Pole Orientation: Axially Magnetized, The Poles Are On The  th Thickness Coating: ni+Cu+Ni 3 Layer Plated Tolerance: All The Dimensions Are +/-0.002in With Coating