NKC Electronics is now using a single 2x18-pin long legged female headers for the MEGA shield header kit and the MEGA shield kits: http://www.nkcelectronics.com/header-pack-for-megashield-for-arduino-mega-stackable.html http://www.nkcelectronics.com/megashield-kit.html

New MEGA shield 2x18-pin female headers

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