Extremely simple and reliable design of the first stage R1 PRO O2 ensures high safety of diving. Although it is a piston construction with an open chamber, it meets the requirements of EN 250: 2000 for cold water machines.Based on the experience of users and the results of research carried out by the laboratories of the Naval Academy in Gdynia, we recommend them to all those diving in Polish waters from early spring to late autumn and for training purposes.Excellent price, simplicity of construction, and hence, low service costs and immunity to "bad treatment" meant that they were used in diving bases in Poland, the Czech Republic, Croatia, Egypt and Crimea and Lithuania.
