Customized version of http://www.thingiverse.com/thing:1285949

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=1285949

Using the following options:

facet_epsilon = 0.01
taper = 1
wall_thickness = 1
clearance = 1
transition_length = 5
len_pipe_2 = 10
len_pipe_1 = 10
od_pipe_2 = 15
od_pipe_1 = 19.4