The speaker towers are constructed with the layer trusses, which is also named steel scaffolding and and combined truss. It consists of pillar, horizontal pipe, diagonal pipe, adjustable base, joint pipe. 

1. It is simple, easy to use, credibility and economy cost. 

2. High quality with zinc galavanized orcold 

3. Heavy duty compacity, widely used in most small, medium and big events.

4. Competitive price and much more durable during the long-term used.

1. In small events, used as the speaker towers in front

2. Hanging LED screen as bacdrop in medium events

3. Hanging audio and large amount of stage lighting in big events

4. Other use such as the work platform 

Here are more photos for the parts details.