Spot-on solution containing 10% w/v fipronil. Presented in pipettes, each containing 0.67 ml (67 mg fipronil), 1.34 ml (134 mg fipronil), 2.68 ml (268 mg fipronil) or 4.02 ml (402 mg fipronil). Also contains butylhydroxyanisole (E320) and butylhydroxytoluene (E321).