This is the lower thread cover (bobbin cover) for a sewing machine. It is compatible with sewing machines of the same type, such as YASM-505A / FHSM-505A. I lost my own cover and was very困った that I couldn't sew, but I bought a set (2 pieces), so I have one spare. I will give it to someone who needs it ☺️ ※Unused and new. ※Please check the compatible models before purchasing. #sewingmachineparts #sewingmachineaccessories #FHSM505A #YASM505A #lowerthreadcover #bobbincover #sewingmachineparts #handsewingmachine #householdsewingmachine