//base
rotate([90,0,0])cube(size = [21,6,0.8], center = true);


//cylindres verticales
rotate([135,0,0])translate([-8,-1.1,-1]) cylinder(h = 4.3,r = 0.5,center = true, $fn = 100);
rotate([135,0,0])translate([-4,-1.1,-1]) cylinder(h = 4.3,r = 0.5,center = true, $fn = 100);
rotate([135,0,0])translate([-0,-1.1,-1]) cylinder(h = 4.3,r = 0.5,center = true, $fn = 100);
rotate([135,0,0])translate([4,-1.1,-1]) cylinder(h = 4.3,r = 0.5,center = true, $fn = 100);
rotate([135,0,0])translate([8,-1.1,-1]) cylinder(h = 4.3,r = 0.5,center = true, $fn = 100);