Silent Obstacles describes a layered construction: a slick, textured TPU surface sitting over a weighted, steel-cored base, with silicone traction underneath. The steel is doing the mass work, the TPU is the riding surface, and the silicone is what keeps the whole thing from sliding across a table when your fingers hit the transition.
The numbers that matter against a deck:
- 6 inches long, 5 inches wide, 2.75 inches tall
- 5 inches of width is a bit under four deck widths at a standard 32–34 mm — enough to come in at an angle rather than straight on
- 2.75 inches of height, with a transition the brand calls smooth and a lip it describes as pool-inspired
Each one is hand-painted and assembled in California, per the listing, and the brand says the material is soft enough that it won't scratch decks or trucks.
One thing the listing doesn't say: whether that pool-inspired lip is anything other than the same TPU as the rest of the surface. There's no mention of metal coping or angle iron, so how trucks behave on a stall or a lip grind — lock in, or push through soft material — isn't something the product page answers.