This ROYAL Conduit Junction Box from Westlake is engineered for maximum ease in the field. Constructed from durable PVC material, it offers UV and impact resistance, ensuring heavy-duty durability. The junction box features smooth interior surfaces for easy wire pulls and is suitable for use with PVC Rigid Conduit. It is NEMA 250 rated for type 1/2/3/4 and 4X environments, making it a versatile choice for various applications.The WESTLAKE RJB12128 is a PVC conduit junction box with a gasket, measuring 12 x 12 x 8 inches. It has a capacity of 1151.6 cubic inches and features a threaded mounting type. The exterior dimensions are 12-1/2 inches in length, 12-1/2 inches in width, and 8-1/4 inches in depth, with interior dimensions of 12.085 inches L x 12.085 inches W x 8.025 inches D. The box is made of PVC material and is gray in color. It is designed for use with PVC Rigid Conduit and is NEMA 250 rated for type 1/2/3/4 and 4X environments. This junction box does not have knockouts.