small_dist = 0.01;

inner_diam = 142;
wall_thickness = 3;
outside_diam = inner_diam + 2*wall_thickness;
height=210;

small_edge_thickness = 1;
small_edge_width = 0.8 + small_dist;
small_edge_inner_diam = inner_diam + 2*0.8;

$fn=200;

linear_extrude(wall_thickness)
circle(r=outside_diam/2);

linear_extrude(height)
difference(){
    circle(r=outside_diam/2);
    circle(r=inner_diam/2);
}

translate([0, 0, height]) {
    linear_extrude(small_edge_thickness)
    difference(){
        circle(r=small_edge_inner_diam/2+small_edge_width);
        circle(r=small_edge_inner_diam/2);
    }
}