Alterno is an anal toy for the advanced users who likes to experiment with texture. - The chain contains 4 types of beads: the cylinder with side ribs, big round beads with ribs and small round beads with nubs and big center bead consisting of two cr ossed flat discs. - Chain starts with big convenient handle. - The material is a firm, non-porous specially formulated TPE that is body compatible and free of dangerous components. - Non-porous it is very easy to clean with water and soap. (Anal Bead s