7 oz 12 mil thick reinforced poly tarp with highly ultra-violent resistant treated reinforcing yarns. Superior protection against the elements. All heat sealed seams provides for a total waterproof tarp, with reinforced hems and brass grommets approx 24" apart. Custom sizes available upon request. Pre-finished size tarpauline may actually finish 3-5% less in size. Need to specify on the PO if a specific finished sizes is required.