A door stopper with a magnet to hold the door in place. Purchased for 830 yen. - Brand: JOINTEX - Product Name: DOOR STOPPER - Color: Black - Size: Width 20mm, Depth 142mm, Height 28mm - Features: With magnet It's reputed to be more durable and easier to use than those from 100-yen shops. When shipping, I will bend a piece of thick paper to fit the Yu-Packet Mini size. Thank you for looking.