Click on the image to check the artwork
Because decorate with wires through the wire and tube, and in the joint part of the wire (such as a long line or wire tube corner) use of the junction box for the transition, wire and tube connected to the junction box, the inside of the line pipe wire connected in the junction box, protect the wire and the connection wire.
The boxes are designed with knockouts to provide flexibility of different size holes.
http://www.vitechdevelopment.com/