National Hardware N193-771 Round Rail, Steel, Galvanized, 2-3/8 in W, 2-13/32 in H, 120 in L Ceilings Features like Automaxx™ one-motion clamping

Features like Automaxx™ one-motion clamping help you save time and effort - by simultaneously clamping your workpiece and automatically adjusting to the exact thickness of your material (from 1/2 to 1-1/2 in)

but with the performance

Air Flow Rate: 11

Perky-Pet Top-Fill Bird Feeder

National Hardware N193-771 Round Rail, Steel, Galvanized, 2-3/8 in W, 2-13/32 in H, 120 in L Ceilings Features like Automaxx™ one-motion clampingDesigned for doors weighing up to 600 lb. per panel. Can be used with various types of single and multiple brackets. Advanced rail design with flat top and sides for easier mounting and better stability. Self cleaning and smoother operation. Interchangeable with other brands of round rail. Manufactured from galvanized steel.