Features: 1) Black building paper: meets ASTM-D779 ASTM-D828 ASTM-E96 2) Specifications: 30min, 6 Features:1) Black building paper: meets ASTM-D779 ASTM-D828 ASTM-E96 2) Specifications: 30min, 60min, 90min, 120min3) Asphalt roofing felt: 15#, 30#, 13#(no. 30), 8#(no. 15), 90#