$fn=100;
  difference(){
  translate ([0,0,1.25]) cylinder(h=2.0, r1= 27, r2=30, center=true);
      translate ([0,0,1.25]) cylinder(h=2.0, r1=23.5, r2=20.1, center=true);
  }
//  difference(){
//  translate ([0,0,2.25]) cylinder(h=0.5, r=20, center=true);
//  translate ([0,0,2.25]) cylinder(h=4.5, r=17.5, center=true);
//  }    
 
  translate ([15.7,15,5]) cylinder(h=5.5, r1=1.4, r2= 1.9, center=true);
  translate ([-15.7,-15,5]) cylinder(h=5.5, r1=1.4, r2= 1.9, center=true);