If you're talking about the fold flat floor, see the attached parts page. This is for crew cab 2500/3500 with black floors. If you need another color, let me know.
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These floors are really nice until they start to wear a bit. In mine, the internal floor pieces are some sort of stiffened sheet, probably a plastic. It's covered with a fabric that's something like a carpet. The hinge where it folds is just fabric, covering a gap between the two pieces. I've got a 55 lb Belgian Shepherd. He jumps in without a problem, and he lands pretty lightly as a general rule. But the fabric is slowly coming detached from the internal sheet. It's coming loose mostly along the hinge, which runs across the cab just under the front of the rear seats. And that's where he lands when he jumps into the truck. The result is that the thing is starting to droop at the hinge because the fabric isn't holding it up as well anymore.
I've toyed with the idea of cutting a slit in the side of the unit and injecting some adhesive between the internal sheet and the fabric to re-adhere it again. Other than that, I like it a lot. It takes a bit to vacuum the dog hair out of it, being that it's more carpet-like than a smoother fabric.
That floor is really nice for putting large boxes, groceries, and other things in the back of the cab, too. I really like it, wish it wasn't wearing out.