... 18u, 22u, 25u, 30u, 45u aluminum foil tapeFeature1) sofe aluminum foil, combined with a transparent high performance flame-retardant ... Designed for sealing joints and seams of foil jacket facings in air-conditioning duct work specifications;1 ... ) Foil thickness; 18, 22, 25, 30, 36, 40, ... long roll: 1.2*45m, 1.2*50 heat resistant aluminum foil tape