aluminum foil tape width; 48mm, 60mm, 70mm thickness; 18u, 22u, 25u, 30u, 45u aluminum foil tapeFeature1) sofe aluminum foil, combined ... high-grade fire rating2) 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