The second stage has an external adjustment knob to adjust the valve to fine tune inhalation effort. The second stage housing and cover are manufactured from durable impact resistant ABS plastic with aluminum brass adjustment knob and barrel tube. The spring and lever are stainless-steel and the second stage comes standard with Teflon coated internal parts, which makes it cold-water ready. The HOG 2.0 Second-Stage is Nitrox ready out of the box.
Warranty Information This product has a limited warranty of 12 months. From HOG