The Seac D ICE DIN 300 bar 1st Stage is made of Sand-blasted forged brass and features a high-performance balanced diaphragm design for constant Intermediate Pressure during dives at any depth. The ICE Kit provides excellent thermal protection in cold water by isolating all moving parts from contact with water. This 1st stage is designed for simple and fast maintenance and includes 2 HP ports and 4 LP ports. The replaceable stainless-steel Valve Seat offers great safety and easy disassembly for maintenance.