This 5751K kit includes a 4 - fuse box, metal fuse box cover, extension stud, and correct 'Old Copper' knurled knob.  NOTE: chrome knobs are common, but incorrect for this application!!!
This is a correct fuse box and cover assembly kit for the classic Jaguar XK140 Roadster (OTS) and Drop Head Coupe (DHC) models.
Our part reference for the 4 way fuse box is 5140, the fuse box cover is 5751, the extension stud is 5143, and the knobs are 5141, which corresponds to the original Jaguar references C2531/C2829, C8820, C5550, C5549.