The GTO FM 144 Automatic Gate Lock is compatible with all single and dual Mighty Mule or GTO swing gate openers, including the FM500, FM502, FM350,, 352, GTO PRO-,2000XL, 2002XL 000, PRO-3200, PRO-4000 PRO4200 and all XL models, MM571W, MM572W, MM371W, MM372W.
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