75-Piece Double-Sided Printed Circuit Board Kit, 20 Double-Sided PCB Prototype Boards, 20 Male/Female Connectors, 15 2/3 Pin Screw Terminal Blocks, 20 Nylon Columns

Double-sided PCB: 4 different sizes. 5 pieces 2*8cm PCB, 5 pieces 3*7cm PCB, 5 pieces 4*6cm PCB, 5 pieces 5*7cm PCB. Hole spacing: 2.54mm. Hole diameter: 1mm. Screw terminal block connectors: 10pcs 2-pin + 5pcs 3-pin screw terminal block connectors for PCB. Header connectors: 10pcs male pin header connectors and 10pcs female pin header connectors. Easy to use: The pre-tinned, plated holes on the board make it very convenient to solder components and sensors for your projects. The perfect electronics kit: The components in this PCB kit are the most comprehensive mix to support a wide variety of projects. Including the jumper cable kit, PCB soldering kit, pin header, screw terminal block connector, and other useful components.