This is the Apeks Sidemount System Scuba Diving Regulator Kit Features: 2 ea. XTX50 DIN regulators with 5 port swivel turrets One XTX50 has a 83 / 210cm hose One XTX50 has a 24" / 60cm hose 2 ea. custom length MP inflation hoses (one for buoyancy system, one for drysuit) 2 ea. brass pressure gauges with 6 inch hoses (units in PSI) 1 ea. 90Adeg elbow fitting 1 ea. bungee necklace 1 ea. stainless steel clip 2 sets of short exhaust ports Regulator bag to hold all Setup illustration, CD manual and quick start guide The Apeks Sidemount Regulator Kit is the first CE approved sidemount kit specifically for this type of diving. XTX50 DIN regulator: For cylinders fitted with a DIN valve only (for cylinders fitted with a standard yoke valve order adapter below) Nitrox Compatible to 40% (The Recreational Limits of Nitrox) Balanced 1st and 2nd stage for superior breathing performance "Diver Adjustable" Airflow Environmentally sealed first stage provides greater reliability, less maintenance and higher performance "Diver Adjustable" venturi to prevent unwanted free-flow Suitable for cold water use 2 exhaust-T&';s with the ability to change from a compact to an ultra wide exhaust-T for better bubble dispersion The Apeks Sidemount Regulator Kit contains all of the necessary hardware and accessories, along with two of their award-winning XTX50 regulators, that will be convenient for the sidemount diver and save him money along the way. Everything a diver needs for a sidemount breathing system is found in this kit."