This 2-piece poly lid has the same sturdy .225" nominal wall thickness as our Bulk Truck and offers outstanding protection yet allows easy access when needed - while creating a weather proof tough cover. The top lid slides from back to front and will fit securely in place. The front vertical cover can be left off during use and will then slide into place creating a complete and secure cover when appropriate. If you need additional security to lock the contents of your load you can request a locking clasp to be installed for an upcharge. This cover is for the 848 bulk truck only. Normally comes in black but can be ordered in any standard color.