The TUSA RS1207 regulator is a light weight, durable regulator perfect for entry level divers. The easy maintenance design makes this regulator ideal for training and rental. Extremely simple to disassemble, reassemble and maintain. Non-balanced flow-by-piston first stage with 4 ow-pressure (LP) ports and 1 high-pressure (HP) port. First stage body is made from durable, corrosion resistant chrome plated brass. The flow-by piston design is the only true fail-safe first stage design on the market. The piston will automatically move downstream from the high-pressure air coming from the Scuba cylinder if there is an unexpected malfunction of the high-pressure seat. This feature guarantees a constant gas-flow to the second-stage regulator.