Precision turned Aluminum 6061 T6 spacers are 0.15" thick and can be used under a standard height bushing to make it the same height as a tall bushing.
 
Voxter trucks are designed for tall bushings, but if you want to ride standards you can with one of these under you boardside bushing (no need to do anything different on top of your roadside bushing). Tall kingpin nuts included in each pack to cover the extra exposed threads when using standard bushings roadside. 
 
Price is for a pair (2) spacers and two tall kingpin nuts. Bushings not included.