fn = 100; difference(){ cylinder (h = 10.5, r1 = 9, r2 = 13, $fn = fn); cylinder (h = 2.25, r1 = 8, r2 = 7.2, $fn = fn); translate([0,0,2.25]) cylinder (h = 8.25, r1 = 8.1, r2 = 11, $fn = fn); cylinder (h = 4, r = 7.2, $fn = fn); translate([0,0,6.5]) cylinder (h = 10, r =20, $fn = 10); }