Boorman tools insect mesh spacers (openscad)

door_lever.scad

translate([0,0,0]) {
  difference() {
    cylinder(h=14, d=30, $fn=360);
    translate([-4,-4,2.52])
      cube([8, 8, 100]);
  }
  translate([-10, 10, 0]) {
    cube([18, 70, 14]);
  }
}

hinge_spacer.scad

height = 2.4;
outer_diameter = 10;
inner_diameter = 8;
opening = 5;

translate([0,0,0]) {
  difference() {
    difference() {
      cylinder(h=height, d=outer_diameter, $fn=360);
      translate([0,0,-1])
        cylinder(h=height+2, d=inner_diameter, $fn=360);
   }   
   translate([1.5,1.5,-1])
     cube([opening,opening,height+2]);
 }
}