The end of these samplers swings for collecting samples at different angles with a maximum of 90°, making them perfect for sampling streams from steep stream banks. The fiberglass poles extends from 6 to 12 feet or from 8 to 24 feet (depending on model) for flexibility in various situations. A 960 ml bottle is included. The included large snapper band holds bottles up to 1,000 ml. The Nasco swing samplers may be used for liquids, powders, or small solids.