Are the Gotoh Resolite Bushings Also Lighter?

[jasper383]

I am looking to remove some weight from a P Bass, and am looking at the Gotoh Resolites.

I have a lead on a set of Resolites here, but they do not include the bushings. Just the key part.

I understand the Resolites are aluminum. Are the bushings also aluminum, that is, are they also part of the weight reduction?

[walterw]

other lightweight keys i've installed had significantly lighter bushings and washers as well.