Bob Martin Clear Flea & Tick Spot On for Cats & Kittens Bob Martin Clear Flea & Tick Spot On for Cats & Kittens is clinically proven to repel fleas & ticks on cats & kittens from 12 weeks of age. Each application of Bob Martin Clear Flea & Tick Spot On will provide up to 4 weeks protection. This 12 week pack contains 3 applications which can be used to treat 1 cat for 12 weeks or 3 cats for 4 weeks. Bob Martin Clear Flea & Tick Spot On is only suitable for cats & kittens over 12 weeks of age. For kittens under 12 weeks, carefully use a flea comb to remove fleas. Bob Martin Clear Flea & Tick Spot On is a pesticide free solution containing Margosa Extract 3% w/w, Ethyl Butylacetylaminopropionate 9.8% w/w & Diethylene Glycol Ethyl Ether 86.95%. If your cat has an existing heavy flea infestation you will need to treat it first with a product such as Bob Martin Clear Flea & Tick Spray to treat your cat & your home to deal with the existing fleas. To ensure any infestation is brought under control, treat your cat, carpets, soft furnishings & your cat's bedding before using this product.