Material Aluminium Sizes 12mm-72mm Thickness 38microns to 55microns Length 40MTR-500MTR Color Silver Minimum Order Quantity 1-5 Box Features: For general purpose seaming, patching and sealing. Highly Suitable for sealing off air conditioning and cool/warm air flow ducting. For sealing joints in ducting providing a flame retardant and vapor-proof barrier. Excellent adhesion on dry/clean surface on metal and other surfaces.