Manufactures' agents are long-term independent marketing partners who grow with their principals and maintain a steady presence in a territory. More than just sell products, agents provide many extra services that add value to the partnership. Some warehouse, some provide engineering consulting services; others offer installation and maintenance services. The foundation of the agent-manufacture relationship is a written contract which specifies such issues as territory to be covered, commission rate, computation and payment of commissions, representative relationship and conduct of business, term of agreement, termination, etc.