Antiparasitic collar that has a long-term effect against fleas, ticks and mosquitoes . Max Biocide Cat Collar The 42 cm cat collar works on the basis of a margosa plant extract - a substance from the tropical Indian zederach tree, which has repellent and biocidal effects . The popularity of this substance is growing, because it is also suitable for animals that are sensitive to chemical repellents, and it does not irritate their sense of smell. The effect of the collar is evident as early as 3 hours after application. It is waterproof and protects your cat for at least 4 months . The collar does not leave a chemical trace in nature. Resistance does not develop on Max Biocide antiparasitic products and collars.