Just drop one of these slim Sani Clean batonnets into your sink or bathtub drain each month to help keep pipes clear and odor-free! Sani Clean drain sticks are biodegradable and environmentally friendly. Sani-Clean batonnets drain sticks are also fuss-free cleaners that have enzymes that break down buildup – helping you have a clean kitchen drain that's free of clogs. Includes 12 batonnets to last a whole year. Each 4" long x 1/4" diameter.