ITEM NAME:Double-Side PCB Prototype Screw Terminal Block Shield Board Kit for MEGA-25 K8Y7 Double-Side PCB Prototype Screw Terminal Block Shield Board Kit for MEGA-25 K8Y7 Unassembled, variety mount methods, you can make flexible use. PCB: FR-4 fiber glass PCB, dual copper layers, size 12.024 x 7.72cm/4.73 x 3.04 inch Pads grid / pitch 2.54mm / 0.1 inch, hole diameter 0.8mm. Terminal block pitch 3.5mm / 0.138 inch, hole diameter 1.2mm. Terminal Block: Pitch 3.5mm / 0.138 inch mini terminal blocks, total 84 pins(3pole x24pcs, 2pole x6pcs ). Wire range 26~16AWG, strip length 5mm, screws M2 steel, pin header and cage brass. Female Header Socket: Pitch 0.1 inch/2.54mm, pin length 15mm / 0.59 inch Single row 10pin x1pcs, singal row 8pin x 5pcs, dual row 18pin x1pcs. colour:Green + black Material:Metal + plastic Package Contents: 1 * MEGA-2560 expansion board 7 * pin socket 30 * Terminals