APEKS REGULATOR - XTX50 TEK 3Apeks has developed unique first stages specifically for use on a twinset. The benefits of this system are that there is a minimised risk of accidental snagging, no hose kinking and easier access to the manifold valves. Each first stage has three medium pressure ports and one high pressure port. They are over-balanced, cold water compatible and extremely robust. TEK3 looks great too! Not only is the TEK3 suitable for twinset use but it is equally suitable for single cylinder or stage cylinder configurations - offering perfect, snag-free hose positioning. TEK3 is sold as a complete set with: 1 ea. LH TEK3 first stage. 1 ea. RH TEK3 first stage. 2 ea. XTX50 second stages. 1 ea. 2.1 metre hose (Synthetic rubber). 1 ea. 0.61 metre hose (Synthetic rubber). 1 ea. regulator necklace.