Bob martin flea clear spot on solution 50mg for cats is for killing fleas on your cat it is applied at the back of the cats neck and between the shoulders each treatment provides protection against fleas for up to 5 weeks bob martin flea clear spot on can be used on cats over 2 months old and is suitable for use in homes with both cats and dogs regular treatment of all cats and dogs in the home with effective flea killing products together with regular vacuuming of your pets bedding and re