Hmmm...could actually be either depending on the period of the model. In general anchor spreaders were made of oak...sometimes in layers. The wood was reinforced with bands made either of rope or iron. If rope, the bands were tarred to protect from weathering thus the black color. It sounds like you could use the rope windings...choose a thick black thread.
Same problem here...depends on the period. Normally if the spreader bands were rope then the anchor "ring" might also be rope. If the bands were iron then the iron ring. But for your model you could simply use the rope for the bands and the ring for the anchor rigging and still be OK. So you have a few choices...Oh, and they give you a split ring for on the end to the block, in the print shows black rope.
