10PCS 2.54mm Single Row Pin 10MM PC104 Long Female Pin Header Socket Strip Stackable PCB Connector 1*6p 8p 10p For Arduino|Connectors| - AliExpress
Stackable Header - 20 pin — Cool Components
10pin 2.54mm Long Stackable Female Header for Arduino R3 (Extra Tall)
8P/10P 2.54MM Stackable Long Connector Female Pin Header|Connectors| - AliExpress
30-pin and 12-pin Dual-Stacking Header Sockets — ameriDroid
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112Pcs 2.54mm Male and Female Pin Header Connector Assortment Kit 100Pcs Stackable Header and 12Pcs Breakaway PCB Board Pin Header for Arduino buy on ZoodMall. 112Pcs 2.54mm Male and Female Pin Header