$fn=100;

difference() {
  union() {
    translate([6,6,0.1])cylinder(h=113,d=13);
    minkowski() {
      cube([12,12,108]);
      rotate([90,0,90]) cylinder(h=0.1,r=2);
      rotate([0,90,90]) cylinder(h=0.1,r=2);
      cylinder(h=0.1,r=4);
    }
  }
  translate([6,6,-4.1])cylinder(h=2.6,d=22);
  translate([6,6,-4.1])cylinder(h=121.3,d=10);
}