Snyder Industrial Cone Bottom TanksAvailable in 30º, 45º, and 60º slopes, sizes range from 15-13,000 gallons. Material options for a diverse range of application requirements. High-density linear polyethylene (HDLPE)*- black and natural white color - complies with FDA Regulation 177.1520 and NSF/ANSI 61 standards. Cross-linked, high density polyethylene (XLPE) - black and natural white color Available with seismic zone 4 and UBC 110 mph wind restraint tie-down systems. Standard specific gravity choices are 1.5 and 1.9, other ratings are available upon request. All materials are UV stabilized for long-term outdoor service. Maximum operating temperature recommended for Cone Bottom tanks is 100 degrees F.