Ocean Reef 1st stage SL 35 TX DIN 300OCEAN REEF IDMs are CE certified with with these high performance and balanced diaphragm first stage with anti freeze kit. Adjustable intermediate pressure Made of chromee plated brass with a stainless steel piston and spring and a Teflon seat. 2 high pressure ports 7 16 20 UNF. Flow rate of approx 4600 l m at 140 bar. DIN (SCREW VERSION) Screw connection at 300 bar (4500 Psi).