This ROYAL Conduit Junction Box from Westlake offers robust durability and ease of use for your electrical installations. Constructed from UV and impact-resistant PVC, it is designed for heavy-duty performance. The smooth interior surfaces facilitate easy wire pulls, making installation more efficient. Certified for use in NEMA 250 type 1/2/3/4 and 4X environments, this junction box is suitable for both above and below ground applications, providing reliable protection for your wiring.The WESTLAKE RJB12124 is a 12 x 12 x 4 inch PVC conduit junction box with a capacity of 578.3 cubic inches. It features a threaded mounting type and is designed for use with PVC rigid conduit. The exterior dimensions are 12-1/2 inches in length, 12-1/2 inches in width, and 4-1/4 inches in depth. The interior dimensions are 12.085 inches in length, 12.085 inches in width, and 4.03 inches in depth. The box is gray in color and is NEMA 250 rated for type 1/2/3/4 and 4X environments. It is manufactured from PVC material, offering UV and impact resistance.