Although skateboards are available in a broad range of designs and materials, all of them feature a board, or deck, an axle assembly, or truck, and four wheels.
(skateboards; are; available; L:in a broad range of designs and materials) (all of them; feature; a board, or deck, an axle assembly, or truck)
skateboards all of them
are feature
available L:in a broad range of designs and materials
a board, or deck, an axle assembly, or truck