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101 Copper Round Tube, Material Copper, Material Grade 101, Outside Diameter 2 1/2 in, Inside Diameter 2.37 in, Wall Thickness 0.065 in, Overall Length 4 ft, Mechanical Finish Mill, Standards ASTM B75, ASTM F68, Wall Thickness Tolerance +/-0.006 in, Outside Diameter Tolerance +/-0.004 in, Fabrication Welded, Yield Strength 36,000 psi, Temper H80, Rockwell Hardness B40, Shape Round Tube, Application Automotive, Conductors, Particle Accelerators, Brinell Hardness 74, Appearance Metallic
18 In.H 18 In.W Drnbl Extrd Alu Intake Louver, Louver Type Stationary Blade, Frame Type Hat Channel, Frame Depth 4 in, Mounting Style Recess Mount, Outside Height 17 1/2 in, Outside Width 17 1/2 in, Rough Opening Height 18 in, Rough Opening Width 18 in, Louver Maximum Intake 744 cfm, Maximum Exhaust 1,063 cfm, Maximum Outside Width 17 1/2 in, Minimum Outside Width 17 1/2 in, Flange Width Not Applicable, Free Area 0.9 sq ft, Beginning Point of Water Penetration 1,031 fpm