Fisherbrand 10-575-136 Multistage Gas Cylinder Regulator. For Noncorrosive General Purpose Gases. Diaphragm-Sensed Dual-Stage Regulators designed for consistent outlet pressure delivery. Ideal for applications requiring maintenance of a constant delivery pressure until cylinder contents are close to empty. Feature Neoprene diaphragms reinforced with nylon fabric, nylon seals, Orthane? seats for first and second stages Dual-scale gauges (PSI/KPa), brass bonnet, External self-reseating relief valve and easy pressure-adjusting knob Delrin Cap Bushing for smooth pressure adjustment Outlet Needle Valve with 1/4 in. NPT male thread Most orders shipped next business day with UPS or Purolator having 5 to 10 business day shipping and tracking.