Coping is what separates your pool's edge from your deck. It essentially is the safety cap that keeps the edge of your splash zone safe from harsh steel edges as well as protects the pool wall from weather, water damage, and general wear and tear when getting out of the pool.
Pre-cast Concrete Coping "Stones"
As the name suggests, concrete is poured into place on top of the pool wall and extends a concrete lip out over the pool wall beyond the deck, into the pool.
Often mistaken as nothing more than packing material, foam forms are long strips of foam with a design etched into one side and are a very important item in your pool kit.
Foam Form Clips