Oceanic SP5 First StageSP5 First Stage Stage offers all divers the opportunity to own a top performing regulator at an unbeatable price. Repeatedly rated as the best in its class, the Alpha SP 5 exceeds both Navy Class A and European CE standards. The Alpha SP 5 may have been the first regulator you ever used due to its widespread use in rental and resort operations. The SP 5 is a non balanced flow by piston designed regulator this simple yet fail safe design will deliver