Sentry Flea and Tick Collar, Dual Action, Sentry, Composition: O-Isopropoxyphenyl, 3-Phenoxybenzyl D-Cis and Trans 2,2 Dimethyl-3-(2-Methylpropenyl) Cyclopropanecarboxylate, n-Octyl Bicycloheptene Dicarboximide, Baby Powder Odor/Scent, 149 deg F Flash Point, For Large Dogs