HG Drain Cleaner Sticks are ideal for preventing blocked kitchen sinks. These convenient unblocker sticks prevent blockages and unpleasant smells. They clean the drain naturally with enzymes which dissolve food residues. The sticks are biodegradable, do not contain microplastics, and are safe to use in the sink. Use an unblocker stick once month, and you will not have a blocked sink or nasty smells in the kitchen. Each pack contains 6 sticks. Enough to prevent blocked sinks for six months during normal use of the sink. If your sink is used intensively, you can put a new drain cleaning stick in the sink more often.