This is an APEKS set for the single tank diver who wants a top-line DIR/Hogarthian rig. First stage is the XTX 100, with an XTX 200 second stage as primary on a 7' rubber hose. The XTX 100 second stage is secondary on a 22" flex hose with a necklace. Also includes a brass and glass SPG from DGX and a short LP inflator hose for wings. The SPG is brand new. This set is about 4 years old with about 200 dives. It has been meticulously serviced. These regs breathe great and are bulletproof in use. They have never given a single problem. The set shows some wear and superficial scratches as would be expected. $400 is well under half of what this set would cost new.Payment via Pay Pal or cash if its a local (south Florida) purchase. I will absorb the 3% Pay Pal charges. If I need to ship, add $15.00 for shipping via USPS Priority. I am also including the original length hoses if you want to convert it back to a traditional set, along with the narrower exhaust Tees for one of the second stages, the box, and the owner's manual on CD. Thanks for looking!