Like our Parshall Flumes, Openchannelflow manufactures fiberglass Montana Flumes in the following sizes:

• 1-inch
• 2-inch
• 3-inch
• 6-inch
• 9-inch
• 12-inch
• 18-inch
• 24-inch
• 36-inch
• 48-inch
• 60-inch
• 72-inch
• 84-inch
• 96-inch
• 120-inch
• 144-inch

Note that it is uncommon to see Montana Flumes larger than 48-inches in size.

In addition to fiberglass, many of the sizes above are also available in aluminum, galvanized steel, and stainless steel.