Description NA121540 MODEL STUDY I 19.5W ⨯ 25.5H inches MODEL STUDY I Part of a grouping of 3 NA121540 MODEL STUDY I NA121545 MODEL STUDY II NA121550 MODEL STUDY III NA121540 MODEL STUDY I NA121545 MODEL STUDY II NA121550 MODEL STUDY III NA121540 MODEL STUDY I NA121545 MODEL STUDY II NA121550 MODEL STUDY III NA121540 MODEL STUDY I NA121540 MODEL STUDY I NA121545 MODEL STUDY II NA121545 MODEL STUDY II NA121550 MODEL STUDY III NA121550 MODEL STUDY III