what does the below mean, buying pickups for a parker p42 and need help

spacing: 50mm or 53mm

conductor: 4 or braided 2

coil: potted or unpotted

leg: long(1/2") or short (1/4")
Most of the answers are here:

Quote by Kensai
You'll find whisky very different, but try it and you'll grow into it, soon you and whisky are one, but still two, lovers dancing across a frozen lake under moonlight, wrapped in honey and warmth.

Sums up whisky perfectly