According to the surface management ,This type of cable tray  can be sorted into:  Fire-retardant Channel-type Cable Tray and non-fire-retardant Channel-type Cable Tray. The fire-retardant cable tray just have two color to be chosen, while the non-fire-retardant Cable Tray can provide you several kinds of color to you as you request. This type of cable tray are fully enclosed , which can protect cables from heat, dust and water, especially the fire. So this type of  cable tray are widely used to support cables in petroleum, chemical industries, light industries, TV or communication industries.

Specification:

Length: 1000mm - 6000mm.

Width: 50mm -1500mm.

Rail depth: 50mm -300mm.

Thickness: 0.8mm - 2.5mm.

Accessories: Horizontal/Vertical tee, bend, reducer, elbow, coupler plate, mounting support, etc.

http://www.guangzhoulongji.com/