font1 = "Arial";
$fn=60;
content = "CarrNum";
difference(){
difference(){
minkowski(){
cube([15,8,50],center=true);
sphere(1);
}
translate([0,0,2]){
cube([13,6,50],center=true);
}
}
rotate ([90,-90,180]) {
translate([20,0,2]) cylinder(r=3,5);
translate([25,0,-7]) cylinder(r=6.5,5);
}

}

translate ([-2,4,-23]) {
rotate ([90,-90,180]) {
    color(c=[0.25,0.25,0.5,1]) {
linear_extrude(height = 3) {
text(content, font = font1, size = 6, direction = "ltr", spacing = 1.1 );
}}
}
}