$fn=90; difference() { cylinder(d=32, h=15); translate([0,0,9.5]) cylinder(d=28, h=6); translate([0,0,-0.01]) cylinder(d=5.5, h=10); translate([0,0,5]) cylinder(d1=0, d2=9.5, h=4.51); translate([0,11,9.5]) cube([20, 3, 6],false); } translate([40,0,0]) difference() { cylinder(d=26.5, h=10); translate([0,0,-0.01]) cylinder(d=3, h=10.02); translate([-20, -26.5/2, 8]) cube([40,10,2.01],false); }