it only a substitute accessories from DollaTek Planche Shield DIY Arduino DollaTek Prototype Screw/Terinal Block Shield Board Kit For Arduino R3 DIY Arduino Uno R3 All holes are plated through All holes are plated throughTop and bottom side are identical copper layers. Note: This is not original Arduino product. DollaTek Prototype Screw/Terinal Block Shield Board Kit for Arduino R3 DIY It only a substitute accessories from DollaTekPackage included:1x DollaTek PCB Board, PCB Dimension: 68., 58mm x 53., 34mm / 2., 7 x 2., 1 ; PCB Thickness: 1., 6mm Carte Arduino Uno PCB Prototype Pour Arduino UNO R3 - DollaTek - 68.58x53.34mm - FR-4 - Pour Projets électroniques DIY Plateforme Soudure Composants Material: high quality FR-4 glass fiber PCB. Pads pitch: In the white frame range: 2., 00mm / 0., 079, hole diameter 0., 8mm / 0., 031., Other pads pitch: 2., 54mm / 0., 1, hole diameter 0., 9mm / 0., 035.