This is a dedicated arm for hanging refill packs of "Sanki's Tsumekae Sonoman" products. Set of two. Length: Approximately 21cm Quoted from the manufacturer's official website: Can be installed on most shower hooks in general households. Regardless of the shape of the shower head, it can be installed because the size is standardized to domestic specifications. If the weight is too heavy, such as hanging three detergents with a capacity of two refills or more, the arm will tilt diagonally, so we recommend using up to three refills of one portion each. Weight capacity: Approximately 2-3kg - Brand: Sanki - Color: White Although never used, some discoloration of the rubber is observed due to storage. There is no water stain. Please consider if you don't mind the discoloration. It has some thickness, so it will be waterproofed and simply packaged.