Cattle activated, gravity block to stop backing out of alley Architectural grade powder coat finish DURABLE: Proven design for any size operation ADAPTABLE: For any permanent or portable corral system VERSATILE: Can be set up for 180º, 135º, or 90º crowding system PORTABLE: Can be assembled in a matter of minutes by a single man REVERSIBLE: With no tools required Architectural grade powder coat finish Recommended using minimum 20' alley Alley should be supported at each end and middle of each panel Alley Frame (AF) and Premier Panels make 25" inside alley width