Tusa RS1001 RegulatorThe balanced diaphragm R1000 first stage is compact and lightweight. It has a full complement of four low pressure and two high pressure ports and is fine tuned for optimum performance. FEATURES First stage (R1000) Balanced diaphragm first stage Cold water insulation system Two H. P. ports and four L. P. ports (2 standard 2 high flow) ports High flow L. P. ports offer up to 15% increase in air flow DIN version available as RS1001 DIN (300bar 4350psi)