The breadboard can provide a good prototype development platform for , and you can circuit on this breadboard and have enough room for more complex circuit Combining functions of GPIO pins to achieve many different functions, you can build an electronic experiment environment Easy to assemble, prototype breadboard, compatible with GPIO, with write-protected ID EEPROM With high-quality material, gold plated prevents oxidation,all pads from top to bottom are plated with holes Purpose: Expansion colour:Orange Material:PC+metal Package Contents: 4 x RPi Prototype Hat Breadboard 4 x Pin Header 16 x Hollow Copper Pillar 16 x Screws M2.5x16mm 16 x M2.5 Nuts Only above package content, other products are not included. Note: Light and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.