An additional regulator being added to the Hollis Regulator line is the 150LX, similar in design to the 200LX but without the PVD Plating. The 150LX delivers great performance at a moderate price. The 150LX is paired with the HO2 1st Stage for an oxygen regulator that will never stop performing. The Front metal ring, packing nut & end cap in Stainless Steel. All LX regulators come standard with MiFlex® hoses and orthodontic mouthpieces with dual color tabs. It comes standard in both YOKE or DIN configuration.