This color-coded stacking header adds convenient color codes to the GPIO header of all Raspberry Pi models, making prototyping and hacking easier. In addition, access is made easier by the elevation. With the same thickness of pins, Dupont cables remain as tight as the original GPIO header. Colour / Functions - orange = 3.3 V - red = 5 V - pink = I2C - purple = UART - blue = SPI - yellow = DNC (Reversed I2C) - green = GPIO - black = GND (ground) Technical data - suitable for all Raspberry Pi models with 40 pin GPIO bar - 2 pin rows with 20 pins each - 2.54mm pin spacing (pitch) - Pin Length: 6.2 mm - Pin thickness: 0.64 x 0.6 mm - Total height: approx. 17.3 mm Delivery without Raspberry Pi