Stackable 0.100″ female header with additional 0.3″ spacer: 2×20-pin, straight40-pin

This extra-high stackable 40-pin female header has two rows of 20 pins spaced 0.1″ (2.54 mm) apart. It includes three 0.1″ thick spacers for extra clearance, and the extended pins allow multiple units to be stacked, as is popular on Arduino shields . The 2×20 size is notably used on raspberry pi models A+ and B+, and the extra 0.3″ height allows stacked boards to remove all components on the raspberry pi B+.