Purchased in 2020. It's a retractable, triangular type. There are scratches on the corners, and some burning on the underside from using the grill with the exhaust vent cover on a few times. One of the non-slip pads is missing. It functions perfectly fine as is, but if you're concerned, you can easily buy replacement non-slip pads (they're just standard stickers) at a 100-yen shop.