I think this is the sole of a sneaker or boot or some kind of shoe, although it’s possible that it is also part of a tire. Those are really the two options for something with these kinds of rubber extrusions. I find this photograph fascinating, though, mainly because it leaves me wanting more! I want to know what the rest of this object, be it a shoe or a tire or whatever, looks like. I also love how the organic lines of the rubber element contrasts with the hard lines of the metal grid it’s resting on. I suppose some lighting tweaks could improve it, but this is the solid foundation of a really nice photograph with some great composition. This photo was published by Kristaps B.