TDS Oceanus Scuba Diving Second Stage:  The TDS Oceanus second stage is a compensated scuba diving regulator second stage, features venturi control to prevent continuous flow and is entirely made of durable thermoplastic polymer.

TDS Ocean PS Scuba Diving Regulator: The Ocean PS model is the single piston TDS series regulator. Simple configuration for high reliability and light weight. Ideal for diving schools, divers who are looking for simplicity, but also chosen by technical divers for stages.