3D Printer APCB Heatbed MK2B RepRap Heat Bed 12/24 Dual APower AHot Plate Module 214x214mmDimensions (Outer): 214mm x 214mmHigh Quality Glass Fiber FR-4 Laminate 1.6mm APower Input: DC 12V / 24V2 Layer 35um CopperRed Soldermask Both SidesWhite Silkscreen Both SidesCopper Plated HolesSupports 12V and 24V operation