There are three different suction cups included; each shaped to fit different contours of the body, so that no matter where a person might have been bitten, they will be able to get a proper, airtight seal around the wound with the scution cup.<br />A complete, compact kit for the treatment of snake bites using the constrictor/suction method. Kit Contains: detailed instructions, 3 pliable suction cups, easy-to-use with one hand lymph constrictor, scalpel, and antiseptic swab.