Ultra Saber insecticide pour on is a ready to use synergized formula designed to provide effective control of horn flies and lice on beef cattle and calves It delivers long lasting protection with one application offering season long lice control from January through April The formula contains one percent lambda cyhalothrin a highly bioactive pyrethroid along with five percent piperonyl butoxide to enhance effectiveness It comes in a convenient squeeze bottle with a dosage indicator for easy application This product is intended for use on beef cattle and calves only and should not be used on dairy cattle or veal calves It also features no slaughter withdrawal making it a practical choice for livestock producers