Specifications:1 layer 35μm copperVoltage: 12/24VResistance:1.4-1.6 Ohm at 12V5.0-5.4 Ohm at 24VMax. Temp: 180° CHeating Time: 24V reaches 100° C in 2 minutesDimensions: 215 x 215 x 3mmWeight: 363gColour: Black with White Mask/TextMK3 can choose 12 v and 24 v two voltage,12 V: one line thread cross 1, another cross 2, 324 V: one line thread cross 2, another cross 3 (1 don't need to pick up).The new circuit, whether meet the 12 v or 24 v, the power is stable.Package included:1 x Printer Heatbed