$fn=50;

difference(){
    cylinder(h=40,d=40);
    translate([0,0,2]) cylinder(h=40,d=38);
}
difference(){
    translate([0,0,36]) cylinder(h=2,d=40);
    translate([0,0,36]) cylinder(h=2,d=32);
}
translate([0,25,35]) rotate([90,0,0]) cylinder(h=5, d=2);
translate([0,-20,35]) rotate([90,0,0]) cylinder(h=5, d=2);
translate([0,-25,35]) rotate([0,135,0]) cylinder(h=30, d=2);
translate([0,25,35]) rotate([0,135,0]) cylinder(h=30, d=2);
translate([21.5,25,14]) rotate([90,0,0]) cylinder(h=50, d=2);

translate([0,25,35]) sphere(r=1);
translate([0,-25,35]) sphere(r=1);
translate([21.5,-25,14]) sphere(r=1);
translate([21.5,25,14]) sphere(r=1);