RELIABILT Brand, Durability, Quality, Value for Money, Longevity and Trust Factor. Multi-shutter steel damper, plastic lever for easy operation to adjust air volume. Duct Size :10-in x 6-in, suitable for sidewall/ceiling opening size 10-in x 6-in. White finish, provide a clean beautification to your sidewall/ceiling. 1/2-In spaced fins, 2-Way air flow. For sidewall or ceiling application, matching color screws included. Listed product sizes refer to the duct opening measurements, not the register itself