P-SYNC Octopus The simple efficiency of the pistonHigh reliability, safety, sturdiness, durability, and simplicity make P-Synchro the ideal regulator for the intense activities of schools and diving centres. Tests conducted by RINA, the Italian certification board, confirmed excellent performance with an extremely low respiratory exertion. First stage materials: shiny chrome-plated brass Second stage materials: ultralight technopolymers HP outlets: 1 LP outlets: 4