... thickness; 18u, 22u, 25u, 30u, 45u aluminum foil tapeFeature1) sofe aluminum foil, combined with a transparent high performance flame-retardant adhesive ... 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, ... roll: 1.2*45m, 1.2*50 heat resistant aluminum foil tape