The Seac D ICE DIN 300 bar 1st Stage is made of sand-blasted forged brass and features a high-performance balanced diaphragm design. The ICE Kit fully isolates all moving parts from contact with water, providing excellent thermal protection in cold water. This 1st stage regulator has 2 HP ports and 4 LP ports, along with a replaceable stainless-steel Valve Seat for easy maintenance and increased safety.