NDS 10" Round Green Irrigation Valve Box Replacement Cover. Made of high-density polyethylene (HDPE) using a combination of virgin and recycled content, this durable cover is treated with UV inhibitors to prevent fading and cracking due to sun exposure. It protects a valve, control zone kit, or other irrigation accessories from the elements, pedestrian traffic, lawn care equipment, and potential vandalism. The cover fits on top of the valve box and has a bolt hole and brass nut to lock down the lid with a bolt (sold separately). It also features two finger holes so the lid can be removed easily with a twist. Works with the 10 inch round valve box (111BC).