Housing:Die-casting aluminum housing with durable corrosion-resistant polyester powder coat finish,shock proof and longer service life. A cable gland is fixed in the bottom of the housing for easy cable entry. The precisely designed plastic hinge connecting the glass and the housing for ensuing the glass free from falling down when open.Sealing gasket:One piece heat proof silicon gasket seals arround the slot of the whole housing for high performance of protection against moisture and contaminant.Clips: High elastic prefix clips screwed on housing for securing front glass rigidly. Slightly pull the clips with a screw driver for quick internal access to optical and electrical compartments for maintenance. Reflector:High specular anodised aluminum reflector optionally with symmetric(S) or asymmetric(A) available,provides high uniformity and optimum reflecting efficiency.