This is a set of two! Although it is new and unopened, it has been stored in a storage space for a long time, so there may be some dust or debris inside. I have uploaded photos of the same product from the same company on Amazon and Rakuten. The model number is different, and the weight capacity is different. This one is up to 4 kg. It seems that you can use one, but combining two seems like you can hang more laundry. Easy to install on the window frame, a clothesline pole with a load capacity of 4kg. - Load capacity: 4kg - Size range: 85cm〜128cm - Installation method: No tools required - Type: Window frame clothesline pole Thank you for viewing.