Janome Bobbin Winder Unit with back arm
Janome have two bobbin winder units with the same part number 827506008 so you need to view both parts and double check if your unit has a extra plastic arm/leg coming out the side, you cannot just go by the part numbers listed
Genuine Janome Part No.827506008 with back arm/leg
XC33 4023 MC3500 MC3000 MC400
may also fit DC3050/DC4100/MC5200/JLX2000/CXL301/CP5000/SL30X/8077/DEX30 depending on the extra arm