- Machinery, Supplies & Equipment - Business Production Related, East Helena
- Machinery, Supplies & Equipment - Construction & Contractor Related, East Helena
- Manufacturing, East Helena
- Manufacturing Products, East Helena
- Masonry Materials & Supplies, East Helena
- Metal Buildings, East Helena - Kits, Homes, Steel Buildings, etc
- Metal Pigment & Paint Products, East Helena
- Metal Supplies, East Helena
- Miscellaneous Agriculture, East Helena
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