I-ST STAGE R4 TEC WW O2 M26x2 - EN250A>10ᵒC. 
(designed for diving in water temperatures above 10ᵒC)
 
> Lightweight, compact, multifunctional membrane-controlled first stage with wet chamber, prepared for diving with nitrox and oxygen.
> The lack of an environmental diaphragm protects the R4 TEC WW from being 'overbalanced' (cutting off gas at greater depths). 
> For supplying rebreathers, stage cylinders and classic configurations.
> Ideal for travelling
 
SPECIFICATIONS:
-balanced main valve
-wet chamber
-ports: 2x HP, 4x LP
-working pressure 300 bar
-material: chrome-coated maritime bronze
-weight 600 grams
-tank connection: DIN M26x2
-tank connection for USA: 5/8
 
BEST USED IN CONFIGURATIONS:
Stage cylinder - very good
Rebreather – perfect
Twinset - very good
Single – good
Sidemount - not recommended