well not sure if theres any interest but i got 2 roof jacks im no longer using , both stainless steel, both center mount, both have the rain collars to go with them . one is for 18 inch pipe the other is for 14 inch pipe. saw some in bascoms mailer for 175 bucks . like to get 125 bucks each. oh wait this should go in the classifieds !!! sorry