This is a set of 4 glass fiber stove seat mats (2 sets of 2 mats each). I use a 3-burner gas stove and bought two sets of 2 mats from 3COINS, but they didn't fit, so I'm selling them. I took them out of the packaging once, but they are unused and in new condition. It's hard to see in the photos, but all 4 mats are packed together in one bag. Although they are unused, they have been opened, so please refrain from purchasing if you are sensitive to this. Heat-resistant glass fiber material - Brand: KITINTO - Product Name: Glassfiber Stove Seat 2P - Size: Outer diameter 24cm, Inner diameter approx. 13cm - Material: Glass fiber Thank you for looking.