Bob Martin Clear Reflective Cat Flea Collar Bob Martin Clear Reflective Cat Flea Collar is an attractive & highly effective way to rid your cat of fleas for up to 6 weeks. Bob Martin Clear Reflective Cat Flea Collar is suitable for cats & kittens over 12 weeks old, but not for pregnant or nursing queens. For kittens younger than 12 weeks & pregnant or nursing queens, remove fleas with careful use of a flea comb. Bob Martin Clear Reflective Cat Flea Collar features an elastic safety buckle, a bell & a special reflective material with felt lining for a comfortable, effective way to help keep your cat safe & flea free, day & night. Clinically proven, Bob Martin Clear Reflective Cat Flea Collar contains the active ingredient Margosa Extract 11.76% to keep your cat flea free. Heavy flea infestations must first be treated with a suitable product such as Bob Martin Clear Flea & Tick Spray to ensure that you eliminate all fleas on your cat & in your home. Please note that colours & designs may vary.