// Fairphone 4 back cover
// length units are millimeters
rimWidth = 2.375;
coverWidth = 74;
coverHeight = 160;
coverThickness = 2.71;
plasticThickness = 0.87;

union() {
    difference() {
        cube([coverWidth, coverHeight, coverThickness]);
        translate ([rimWidth, rimWidth, -0.01]) {
            cube([coverWidth - (2*rimWidth), coverHeight - (2*rimWidth), plasticThickness]);
        }
    }
    
    translate([33.59 + rimWidth, 4.39 + rimWidth, coverThickness - plasticThickness]) {
        cube([32, 32, 3.58]);
    }
}