These headers are made to work with the Teensy 4.0, 3.2 and Teensy LC development boards. Each kit of headers makes your Teensy breadboard compatible and will allow for stacking a Teensy and Teensy-compatible shield board. This kit includes five headers (two 13-pin, one 7-pin, one 3-pin, and one 2x7 right-angle SMT), enough to connect your chosen Teensy in any configuration you need! Note: This Header Kit can also be used for the Teensy 3.0 and 3.1, as the pin layout has not changed between the three versions. Package Contents * 2x 13-pin stackable header * 1x 7-pin female header (for pins on end) * 1x 3-pin header (for 3-off grid holes) * 1x 2x7 right-angle SMT header, for the surface mount pads on the back of the Teensy 3.2 Teensy board not included. https://elecena.pl/product/28644812/header-kit-for-teensy-4-0 2025-05-10 https://elecena.pl/product/28644812/header-kit-for-teensy-4-0 2025-11-29