These are sponges for cleaning beer lines in a beer server. I think there are about 100 pieces per sponge. This is a set of 2. The set is discounted. If you want more, please comment. The more sets you buy, the cheaper they are. When used for cleaning draft beer lines with water, they remove dirt from the inside of the hose, making it less likely that the quality of the beer will deteriorate. Instant purchase available.