NETTETF-1 Program. National F-1 Sale. The 2024 ABBA National F-1 Female and Bull Sale is set for April 13, 2024 in Brenham, Texas. This sale features Golden Certified F-1 Females, Certified F-1 Females, Registered Brahman, Hereford, and Angus females, and Registered Brahman, Hereford, and Angus bulls.