High-density polyethylene (HDPE) tanks come with or without a needle-type polypropylene Spigot. Spigot has 1-1/8"-12 female screw thread. Spigot is mounted on a welded polyethylene Boss and accepts 5/8" ID tubing. Polypropylene (PP) tanks offer good stress-crack and chemical resistance. Maximum service temperature up to 104°>C (220°>F). black HDPE tanks are manufactured with a pigmentation that protects the tank from UV light and can be used outdoors without deterioration from sunlight. Black color protects photo-sensitive media. Sturdy design complies with 21 CFR 117.1520 contain drips with stepped-flange design. Get easier sampling of liquids-tanks over 30 gallons are designed for near-total drainage. No separate part number for lid-all tanks include lid of same thickness. Rated for use with 1.8 specific gravity media.