Square Four ways Lay In Diffuser 1.Construct from aluminium. 2.Painted finish in powder-coat white. 3.Fitted a removable core Features1. A removable core with blades which direct four ways airflow is fitted in the rectangular flush frame. 2. The core section is removable for easy installation and maintenance.3. The diffuser is constructed from aluminium and finished in powder-coat white.4. ...