These flat cover fits the risers and distribution boxes. Each one cover comes with a factory-installed gasket. The cover of a distribution box can be made of various materials, including metal, plastic, or composite materials, and may be designed to protect the box from damage, provide easy access to its contents, or facilitate its installation and maintenance. Distribution boxes are commonly used in. Yueqing Beigang Industrial Socket Distribution Box is an electrical distribution device that adopts a plug-in method, which is more convenient and practical than traditional terminal wiring. They play a pivotal role in ensuring the reliable flow of power, serving as the backbone of electrical systems in. Our 12" covers are made of HDPE with the highest UV Protection on the market today.