Many divers credit Halcyon's streamline P-valve as being among their best equipment purchases; the enhanced comfort and peace of mind redefine one’s diving experience. Whether you are interested in a short, comfortable dive or face long decompression obligations, the Streamline P-valve can provide a new level of diving comfort. The Halcyon P-valve kit includes everything required for installation: P-valve with hose, installation/owners manual, adhesive, one catheter, a 2-oz. cleaning bottle, a wrench, and sandpaper.