This is a RPI 3 B case (may fit others but IDK). There are 2 options and because of the shell, you cannot mix and match the pieces. Cutout Top and Bottom MUST go together Top and Bottom MUST go together If you try to mix and match and it doesn't fit - that's a YOU problem. Snap fit shell AND allows you to heat smash the pins to the PI stays in the shell snuggly.
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