This stacking header easily creates space between the Raspberry Pi and expansion boards and contains 2x 2.5 mm spacer plates on the stacking header. Technical data: - 2-pin rows with 20 pins each = 40 pins - Pin spacing (pitch): 2.54 mm - Total height: 19.5 mm - Option 1 (base height / pin height): 8.1 mm / 11.4 mm - Option 2 (base height / pin height): 11.4 mm / 8.1 mm - option 3 (base height / pin height): 13.3 mm / 6.2 mm) - pin thickness: 0.65 x 0.35 mm - gold-plated contacts Note Removing the spacer plates can be difficult!