This category is for the organization of links to companies which supply products (other than equipment) to the trenchless technology industry. @Links to broader categories should be created where possible, but duplications are acceptable into this sub-category if necessary to distinguish a few product manufacturers who actually provide products directly suited to and promoted for trenchless technology use. Sites of diversified companies should not be excluded merely because they do more than trenchless technology. Where possible deep-links to trenchless technology pages should be used to show the diversified company's trenchless technology products. When such deep-links are not possible or practical, the site description should specifically express the company's trenchless industry involvement.