DIN Rail Mount Screw Terminal Block Breakout Board for ESP8266-DevKitC. With the breakout board, you can easily extend ESP8266-DevKitC projects to industrial control applications. PCB mount Terminal Block: pitch 5.0mm/0.197", strip length 7mm, screws - M2.5, steel, Cr3+ Zn plated. pin header and cage - brass. Wire range 28AWG ~ 12AWG / 2.5mm square. High quality Taiwan DINKLE Fireproof nylon material DIN rail mount carrier, can support width 35mm / 32mm / 15mm rail, and the carrier can be taken apart for panel mount use. FR-4 fiber glass PCB, dual copper layers. Note: the item not include ESP8266-DevKitC board. The breakour board supports ESPRESSIF official ESP8266-DevKitC, but we do not guarantee whether to support third-party modules, you can check the ESPRESSIF official website for more information before buying. Datasheet: https://www.czh-labs.com/tmp/madeimg/datasheet/d-1357.pdf