It's a great value set! This is a set of [1 Hinoki Stage] x [3 Hinoki Steps]. There is no replacement service for this item. Thank you for your understanding. (*_ _) This is a set of our usual Hinoki stage and wooden steps, which is very helpful for pets who have trouble climbing up and down! Pets who sleep on the floor might actually want to be up high and look down, but they endure it because they can't climb. Let's make their living space more comfortable for them! d('∀'*) ♪ Run ⋆⸜(* ꒳ * )⸝Run ʓ Խ♬( * ꒳ *)ʓ Խ♬ You're really getting into it! ( °◊° ) Ho! [Hinoki Stage] 1 piece Width approx. 14cm x Depth 8cm Thickness approx. 12mm Washer diameter 2.5cm = 4 pieces [Hinoki Wooden Steps] 3 pieces Width approx. 4cm x Depth approx. 8cm Thickness approx. 12mm Washer diameter 2cm = 6 pieces