
Ace Roto-Mold Rotational Molding
Ace Roto-Mold, a division of Den Hartog Industries, is well known for quality tanks and accessories that fit a variety of industrial and agricultural containment needs. |
Injection Molding
The Injection Molding division of Den Hartog Industries provides injection-molded parts to meet the needs of a variety of industries, from medical and agricultural to OEM’s. |

Blow Molding
Den Hartog Industries’ newest plastic manufacturing process uses Blow Molding to produce high-volume proprietary and custom parts. |

Sowjoy Metal Fabrication
The Sowjoy division offers proprietary and custom metal fabrication as well as in-house mold design and fabrication. |