$fn=90; include W=3; D=50; tube(od=50, h=80, ochamfer1=2, wall=W, anchor=BOTTOM) position(TOP) tube(od1=50, id2=50, h=3, wall=W, anchor=BOTTOM) position(TOP) tube(id=50, h=25, wall=W, anchor=BOTTOM) position(TOP) tube(id1=50, id2=50, od2=65, h=5, wall=W, anchor=BOTTOM) position(TOP) tube(od=65, h=5, wall=W, anchor=BOTTOM) position(TOP) tube(od1=65, id2=50, od2=65, h=5, orounding2=2, wall=W, anchor=BOTTOM) position(TOP) tube(id=50, h=5, wall=W, anchor=BOTTOM) ;