bezelWidth = 20.8;
bezelDepth	= 27.5;
headphoneBandThickness = 35;
headphoneBandHeight = 12;
screwDiameter = 17;
tolerance = 1.05;
screwDepth = 17;
screwHead = 5;
headphoneSupport = 2;
wallThickness = 5;

difference()
linear_extrude(bezelDepth + wallThickness) {
    polygon([[0,0],
        [bezelWidth + wallThickness,0],
        [bezelWidth + wallThickness,bezelWidth + wallThickness],
        [0,bezelWidth + wallThickness]
        ]);
}
    translate(bezelDepth,0) polygon([
    [0,0],
    [bezelWidth,0],
    [bezelWidth,bezelWidth],
    [0,bezelWidth]
]);