I purchased this from the manufacturer's website via personal import, but I've decided to keep the original pickups in the guitar I planned to install it in, so I'm putting it up for sale as I have no use for it. The pole piece spacing is 50mm. Please refer to the photos of the box for other detailed specifications. I ordered this with aged processing to match the guitar I planned to install it in. It's a new, unused item, only taken out of the box for the photos. UK-made, hand-wound Bare Knuckle pickup, with the original box. - Model: Bare Knuckle Pickups - Country of Manufacture: UK - Hand-wound: Yes - Included Items: Original box, instruction manual Thank you for looking.