We allow a minimum of 6 months sponsorship. We recommend 12 months, as this allows us to advertise you through all seasons. Some trades are very seasonally orientated. A one month trial doesn't include a mass email to the forum, and promotional threads created during this trial would be removed afterwards if a minimum of 6 months isn't chosen afterwards.
Let us know a bit about your company and what products and / or services you provide to the industry.