Characteristics It has strong anti-bacteria activity against Gram-negative bacteria. Low incidence of anti-drug reactions. No drug cross-resistance with other antibiotics. It can not be particularly absorbed in alimentary tract. It is highly safe and in lack of residue. It is especially manufactured for healthy foods. It promotes growth and increases Feed utilization rate. Specification 2%,4%,10% Packaging: 25kg per kraft paper bag packed with plastic inside or making adjustment in packaging according to customer requirements. Storage: It should be kept in a dark dry place. Expiation Date: It does not expire until the day of the second year after the manufacturing date.