for Raspberry 4 Pi GPIO Expansion Board Hat for 4 Model B+/3B/2B Features: Good gold plating The product is suitable for 3B+/2B/B+. Products for GPIO expansion. You can solder the module chip circuit on the board. we break out nearly every pin you could want to connect to the Pi. Specifications: Size:6.5X5.6cm/2.65X2.2in Material:Copper Weight:26g Accessory Type: Extension Board for 3B/2B/B+ Package Includes: 1 x Proto HAT Shield 1 x 2x20Pin 4 x Nut 4 x Screw 4 x Stud Bolt (not lnclude board) note: Due to the problems of lighting effects and angles, there will be certain tolerances in the product, please understand. Please allow 0-2mm error due to manual measurment.
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