Para block controls odor for up to 60 days. Ideal for deodorizing larger areas. Each block includes cardboard box for hanging. Hang above door for best results. Complements urinal and bowl blocks. Scent: Cherry; Physical Form: Solid; Application: Odor Control. ~ Includes six wall-mountable para block air fresheners.FRS616HUCH. 616HUCH. Fresh Products 16 oz. Cherry Wall Blocks.