Trucks come as a pair. Bushing color may vary.

Size information: 

143 - 7.125" axle - for decks 7.4" or smaller

145 - 7.62" axle - for decks 7.4" - 7.9" 

147 - 8" axle - for decks 7.9" - 8.12" 

148 - 8.25" axle - for decks 8.12" - 8.38"

149 - 8.5" axle - for decks 8.38" - 8.62"

151 - 8.75" axle - for decks 8.62" - 8.85" 

161 - 9.125" axle - for decks 8.9" and bigger