Feature: 1. No need to clean up the residue without cleaning components. 2. No electricity or chemical refrigerant, only filtered compressed air for industrial use. 3. Instant on / off, easy to control, cooling does not produce any waste. 4. Only manual knobs and adjust the air outlet temperature thermometer. If the compressed air inlet pressure and temperature remain constant, the outlet temperature of the vortex tube will be kept within the range of ± 1 ° F (± 0.6 ° C) for sustained. 5. Suitable for high temperature, high fever, high humidity, specially for cold labor protection environments. Such as metallurgy, forging, welding, glass, fire, petroleum, power plant, boiler plant, sandblasting, paint baking, and so on. Specification: Features: Gas flow rates up to 35 SCFM (990 SLPM). Cooling power up 2500Btu / H (630 Kcal / H, at 100psi pressure power is 2800BTU / H, 821Kcal / H). No need to clean up the residue without cleaning components. No electricity or chemical refrigerant, only filtered compressed air for industrial use. Instant on / off, easy to control, cooling does not produce any waste. Only manual knobs and adjust the air outlet temperature thermometer. If the compressed air inlet pressure and temperature remain constant, the outlet temperature of the vortex tube will be kept within the range of ± 1 ° F (± 0.6 ° C) for sustained. Suitable for high temperature, high fever, high humidity, specially for cold labor protection environments. Such as metallurgy, forging, welding, glass, fire, petroleum, power plant, boiler plant, sandblasting, paint baking, and so on. Specification: Material: Cotton / oxford Size: Freely adjustable Color: Blue Composition: Scroll mainframe, vest (self compressor) Cold source: Compressed air (compressor only, no accessories required) Size: Vortex tube host: 18.3 x 11cm / 7.20 x 4.33 inch (appr.) Vest: 52 x 49cm / 20.47 x 19.29 inch (appr.) Waist belt: 115cm / 45.28 inch (appr.) Package List: 1 x Vortex tube host 1 x Vest 1 x Waist belt Package List: 1 x Vortex tube host 1 x Vest 1 x Waist belt No need to clean up the residue without cleaning components.No electricity or chemical refrigerant, only filtered compressed air for industrial use.Instant on / off, easy to control, cooling does not produce any waste.Only manual knobs and adjust the air outlet temperature thermometer. If the compressed air inlet pressure and temperature remain constant, the outlet temperature of the vortex tube will be kept within the range of ± 1 ° F (± 0.6 ° C) for sustained.Suitable for high temperature, high fever, high humidity, specially for cold labor protection environments. Such as metallurgy, forging, welding, glass, fire, petroleum, power plant, boiler plant, sandblasting, paint baking, and so on.