About the 12" x 12" Modular Core Diffuser in T-Bar Panel w/ 10" Collar, White - Shoemaker 700MA-12X12-10
Skip a trip to the store and buy the 12" x 12" Modular Core Diffuser in T-Bar Panel with 10" Collar in soft white (Shoemaker 700MA-12X12-10) here at PlumbersStock. The adjustable modular core uses fixed curved blades to maintain horizontal airflow. Standard collar diameter is the same as the diffuser size. It includes a 2-inch ADC compliant round collar with bead for much easier installation. Shoemaker products will last you a long time, but parts will wear, and you can find replacements here when they do.