aluminum flexible ducting Specifications Flame retardant Excellent elasticity and flexibility Aluminum Flexible DuctingMaterial:soft aluminum foil. Thickness: 8u-12uI.D.: 50mm-500mmTemperature range: -25°C to +250°CFeaturesMade of aluminun with thickness 0.05mm~0.48mm,optional 9 corrugation or 4 corrugationMax air velocity: 30m/s, max operation pressure:2000pa;Standard length:1.5m,3.0m,4.0m,the ...