Black 4" Silver 4" Stl adapter to squirel cage blower.	500CFM fan SL141 8" Hose SL119 Combination SL160 A typical exhaust specification for a 12"x24" table laser system would be 500 CFM at 6" static pressure. Keep in mind that this air volume and pressure specification is needed at the exhaust outlet of the laser system. The number of bends in and the length of the duct will reduce the airflow and pressure. Systems as low as 52cfm  low power. 300 cmh 176.573334 (cubic feet) per minute 500 cmh 294.288889 cubic feet per minute	Exhaust Pipe STL
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