To Assess the Efficacy and Safety of PT010 Compared to PT009 in Subjects With Moderate to Very Severe Chronic Obstructive Pulmonary Disease

This is a multicenter, randomized, double-blind, parallel-group, 12-week chronic-dosing study to assess the efficacy and safety of BGF MDI compared to BFF MDI in subjects with moderate to very severe COPD. The study has a total of 7 visits over a Screening Period of up to 28 days and a Treatment Period of 12 weeks followed by a telephone follow-up call 14 days after the last dose of study drug.