ACTIVE CONSTITUENTS: 15 g/L FLUAZURON, 5 g/L IVERMECTIN. iO Tick Off Duo contains fluazuron and ivermectin to give the dual benefits of tick control (fluazuron) and broad spectrum internal/external parasite protection (ivermectin) in one easy to use pour-on. Use in strategic cattle tick programs when broad spectrum parasite control is required in tick infested geographies. APPLICATOR: iO 30ml Variable Applicator with Spray On Nozzle