When we're dealing with surface mounting pickups, traditionally, there will be some relatively hard, close celled foam underneath which will give some level of height adjustment - its certainly not variable as "hanging" pickups, with the bolts and springs, but its fairly common - The Jazzmaster®, Jaguar®, Precision® and Jazz® Bass, as well as most P90s will employ sponges.

We've got the here, in 2 different styles (what we think of as P Bass® and J Bass® sizes - but, obviously, they're going to fit other pickups too) and 2 different heights. Neatly cut and with an adhesive backing for easy installation.

Quantity - 1
Material - Closed Cell Foam
Weight - 1.25g

"P Bass®" Dimensions
40mm (L) x 20mm (W) x 18mm or 13mm (H)

"J Bass®/P90" Dimensions
70mm (L) x 15mm (W) x 18mm or 13mm (H)