Plastic hanger has a pressure-sensitive clip that holds enzymatic para block in place, even during cleaning. Cellophane-wrapped to keep block intact. Contains billions of beneficial bacteria that release enzymes to destroy odors at their source. Fights odors for up to 30 days. Springtime fragrance. 3.5-oz. block. 12 blocks per box; 12 boxes (144 blocks) per case. Sold by the case.