The 150LX regulator is similar in design and performance to the 200LX but without the PVD Plating and diver inhalation adjustment. The 150LX delivers great performance at a moderate price. The 150LX is paired with the workhorse HO2 1st Stage for use with 100% oxygen. The second stage front metal ring, packing nut & end cap are all made of 316 Stainless Steel. All LX regulators come standard with MiFlex® hoses and orthodontic mouthpieces with dual color tabs.