The Laser Line long path gas cell is a variable path length cell with a battery operated visible laser alignment system. The cell features a borosilicate body, SS valves and fittings with 1/4' Swagelok® connections and flow tube.Pathlength: 2 to 20 meters, variableCell hardware: black anodized aluminumTemperature range: ambientPressure: vacuum to ambientCell body: borosilicate glass (Pyrex®)Optical coating: gold + nonabsorbing protective layerTransfer optics: KBr 25mmx4mm Volume: 8 liters