Red PCB Heat bed MK2B for RepRap 3D printer 214 x 214 mm Heated bed area : 200x200 mm 2 layers 35um Copper Laminate: FR4 1.7mm + -0.15mm Resistance: 1.0~1.2 ohm (12V) - 3-3.4 ohm(24V) Red Soldermask White Silkscreen both sides Power Input: Support 12V dan 24V Maximum heating temperature: 300 copper plated holes