The Clear Plastic Bobbin Cover
For the F Series HZL-F300, HZL-F400, HZL-F600 & New G Series G220 G120 G110 with LCD Backlight Screen (Double Check plate shape)
The Hook Cover is the little plastic door on your needle plate of your sewing machine that covers your bobbin and bobbin case.
Genuine Juki Part - 40064685
